Timstar International Catalogue 2018-19

Motic Microscopes MICROSCOPES Moticams The Moticam allows a normal microscope to be turned into a digital microscope with ease. A wide range of models are available to suit all budgets and requirements. The WiFi Moticam X allows multiple students to view images on their own devices, and the new Moticam 1080 can be connected directly to a projector or screen without a computer. The “All in One Box” concept behind the Moticam gives you everything you need to begin working, without additional accessories needed. Each Moticam is supplied with a CS ring adaptor, focusable lens, 30 mm and 38 mm eyepiece adaptors, USB cable, calibration slide, macro tube, and Motic Images Plus 3.0 software for Windows, Mac and Linux. AB CDE NEW NEW NEW F NEW G BEST SELLER ...the downloadable OUR EXPERTS SAY... MoticConnect app makes photo-sharing easier than ever before, allowing you to save and send microscope images, make notes on the images and view live images on multiple wireless devices. H NEW Android, Google Play and the Google Play logo are trademarks of Google Inc. Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. Model A B CD E F G H Moticam 1 Moticam 2 Moticam 3 Plus Moticam 5 Plus Moticam 10 Plus Moticam 1080 Moticam X Moticam X2 Resolution Connectivity 1.0 MP 2.0 MP 3.0 MP 5.0 MP 10 MP 8.0 MP still 1.3MP 1.3 MP USB 2.0 1080p video Wi-Fi USB 2.0 USB 3.0 USB 3.0 USB 3.0 WiFi + Ethernet USB HDMI + USB 2.0 USB USB + Power USB MI170105 USB USB USB 12 V external MI130515 rechargeable £412.44 £374.94 battery Catalogue Code MI130505 MI180520 ✓ MI180525 ✓ MI180530 ✓ MI180590 ✓ Price £162.44 £681.19 £874.94 £968.69 £918.69 MI180517 ✓ £487.44 Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 449

MICROSCOPES Motic Microscopes Red Line Microscopes Motic Red 220 Motic Red 100 Series The RED 220 from Motic is an advanced biological microscope with binocular viewing and quality optics. Suitable for use by advanced biology students, The RED 100 series from Motic is a modern range of microscopes suitable for teachers, laboratory and medical technicians etc. use across many age ranges, from primary to secondary and UTC students. Features: The RED 100 is available in monocular, binocular and digital versions with all the standard features and options expected for this class of microscope. • Siedentopf binocular head Features: • Large, heavy microscope body for better stability • Coaxial focusing controls • High quality EA achromatic objectives • Improved level of optical performance • Cordless, with rechargeable battery pack • Semi-Plan (SP) objectives give supreme contrast with crisp and clear • LED illumination for cool-touch, low power use and extended lamp life • Gliding stage with “One touch” sample clips or Mechanical stage with images sample holder • High precision Coaxial focusing controls • LED illumination for cool-touch, low power use and extended lamp life • Convenient inbuilt carrying handle • Intensity control adjustment • 10 year limited warranty • 10 year limited warranty Specifications: Specifications: • Optical System: Finite optical system, 160 mm • Optical System: Finite optical system, 160 mm • Observation Tube: Monocular – RED 100; RED 120 • Observation Tube: Binocular Siedentopf type • Binocular Siedentopf type – RED 132 • Inclination: 30° inclined, 360º rotating • Interpupillary distance: 55-75 mm Inclination: 45° inclined, 360º rotating – RED 100; RED 120 • Dioptre adjustment: Yes, one side only 30° inclined, 360º rotating – RED 132 • Eyepieces: WF10x/20 mm • Nosepiece: Reversed quadruple, revolving with click stops • Interpupillary distance: 55-75 mm – RED 132 • Objectives: Achromatic Semi-Plan 4x; 10x; 40x/S; 100x/S-Oil • Dioptre adjustment: Yes, one side only – RED 132 • Stage: Low position coaxial mechanical stage with sample holder and • Eyepiece(s): WF10x/18 mm with pointer, lockable • X/Y travel range • Nosepiece: Reversed triple, revolving with click stops – RED 100 Condenser: Spiral mounted 1.25 N.A. Abbe condenser with iris Reversed quadruple, revolving with click stops - RED 120; diaphragm • RED 132 • Focus mechanism: Coaxial coarse and fine with tension adjustment EA (Achromat) Objectives: DIN 4x; 10x; 40x/S – RED 100 • Illumination: LED 3 W with intensity control DIN 4x; 10x; 40x/S; 100x/S-Oil - RED 120; • Accessories included: Dust cover, charger and batteries • Dimensions (L x W x H): 260 x 175 x 354 mm • RED 132 • Weight: 5.7 kg Stage: Gliding stage with “one-touch” sample clips – RED 100 Low position coaxial mechanical stage with sample holder and BEST • X/Y travel - RED 120; RED 132 SELLER Condenser: 0.65 N.A. condenser with iris diaphragm – RED 100 Spiral mounted 1.25 N.A. Abbe condenser with iris • diaphragm - RED 120; RED 132 Focus mechanism: S eparate coarse and fine – RED 100; RED 120 • Coaxial coarse and fine – RED 132 Illumination: B attery/Cordless LED 20 mA, 3.5 V, 70 mW with intensity control • Accessories included: Dust cover, charger and batteries • Dimensions (L x W x H): 234 x 152 x 334 mm • Weight: 4.7 kg Model Type Illumination MI162100 RED 100 Monocular LED, variable £174.94 ea MI162102 RED 120 Monocular £249.94 ea MI162104 RED 132 Binocular LED, variable LED, variable ✓ £412.44 ea SPARES & ACCESSORIES £57.39 ea MI162200 ✓ £512.44 ea MI162101 Micrometer eyepiece, 10mm x 0.1mm £22.06 ea SPARES & ACCESSORIES £74.94 ea MI162103 Eyepiece reticule, 10 x 0.1 mm £11.05 ea MI162201 Micrometer eyepiece, 10mm x 0.1mm £24.94 ea MI162105 Eyepiece reticule holder MI162203 LED light assembly, 3W £3.11 ea MI162107 Replacement LED, 70 mW £8.84 ea MI162205 Dust cover MI160570 Motic SFC, BA50, F11, DM-39 & DM-111 series £3.11 ea microscopes 450 …inspiring tomorrow’s scientists through practical science.

Motic Microscopes MICROSCOPES Red Line Microscopes continued Motic RED 50-X Wi-Fi Digital Microscope Motic RED 30S The RED 50-X from Motic is a basic microscope with an integrated Wi-Fi camera of 1.3 MP and represents the latest in Educational technology. This The RED 30S from Motic is a stereo microscope with quality build and digital microscope can transmit live images to PC, iOS or Android Tablets. It performance and is ideal for the first steps into the world of stereo microscopy. features high-speed, full resolution imaging technology built into the head of The base is completely sealed to protect the illuminator from liquids that the microscope. Use it as a normal microscope with the built-in eyepiece or might be spilled and units come equipped with incident and transmitted LED share live images with your class using Wi-Fi tablets or Windows Laptops. illumination, carrying handle for easy transportation and “one touch” sample clips. Specifications: Features: • Monocular head with Built-in digital WiFi camera CMOS 1/3” chip • 2-step magnification changer for sample overview and detail information • Optical System: Finite optical system, 160 mm • Incident and transmitted LED illumination - bright light, long lifetime, no • Observation Tube: Monocular with built in digital X type Wi-Fi camera • Inclination: 30° inclined, 360° rotating heat; safer for living samples living samples • Camera sensor: CMOS 1/3” - 1.3MP - 1600x1200 pixels • Output: Wi-Fi transmission up to 1.3 MP • Incident and transmitted light can be regulated independently • Eyepieces: WF10x/18 mm • Large microscope base and minimum height • Nosepiece: Reversed triple revolving nosepiece with click stops • “One-touch” sample clips to hold slides • Objective type: Achromatic objectives, DIN • Can be used to view specimens such as minerals, fossils or plants • Objectives: 4x/; 10x/; 40x/S • Cordless, with rechargeable batteries for versatility • Stage: Gliding stage with “one-touch” sample holder • Incorporates large carrying handle • Upper limit stop: Preset and adjustable • 10 year limited warranty • Condenser: 0.65 N.A. with disc diaphragm • Focus mechanism: Separate coarse and fine focusing system Specifications: • Filter: Built-in frosted glass • Illumination: LED 20 mA, 3.5 V, 70 mW with intensity control • Optical System: Greenough • Power supply: Charger 100-240 V or rechargeable batteries • Observation Tube: Binocular head • Accessories included: Calibration slide, dust cover, immersion oil (5 mL), • Interpupillary distance: 52-69 mm • charger and batteries • Dioptre adjustment: Yes, one side only • Inclination: 45° inclined Software: MotiConnect App for iOS and Android, Motic Images Plus • Eyepieces: WF 10x/20 mm 2.0 for PC • Objectives system: Turret changer with LED incident illumination • Objectives magnification: 2x / 4x • Operation system: Windows XP and higher, Mac OSX, Android and iOS. • Working distance: 50 mm • Dimensions (L x W x H): 175 x 153 x 334 mm • Focus mechanism: Coarse focusing system with tension adjustment • Weight: 2.75 kg • Incident illumination: LED 3.5 V/100 mW with intensity control • Transmitted illumination: LED 3.5 V/100 mW with intensity control • Power supply: Charger 100-240 V or rechargeable batteries • Accessories included: Black, white and frosted stage plates, dust cover, charger and batteries • Dimensions (L x W x H): 225 x 179 x 250 mm • Weight: 3.5 kg MI162500 £406.19 ea SPARES & ACCESSORIES £31.00 ea MI160050 x40 Objective £10.88 ea EL160500 USB Plug-top Power Supply £3.78 ea EL101392 Male A to Male B, 2 m MI162300 £168.73 ea MOTIC Wi-Fi DIGITAL SPARES & ACCESSORIES £53.34 ea MICROSCOPES MI162301 Micrometer eyepiece, 14mm x 0.1mm £15.38 ea MI162303 LED Assembly top light £9.98 ea These microscopes require two power supplies: one for the illumination MI162305 LED Assembly bottom light £2.25 ea (supplied) and USB power for the camera. You can use either a MI162307 White Stage Plate £2.25 ea computer USB port, or a USB plug‑top power supply for this. MI162309 Black Stage Plate £2.25 ea The USB port on the Wi-Fi microscope is for power only – the image is MI162311 Frosted Stage Plate £3.11 ea not transmitted over USB. MI160570 Microscope Dust Cover for Motic SFC, BA50, F11, DM-39 & DM-111 series microscopes Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 451

PROFESSIONAL MEASURING Compound microscopes  |  Stereo microscopes OBS 106 OBE 114 OSE 417 OBS 101 www.kern-sohn.com OSF 439 ADVERTISEMENT

Kern Microscopes MICROSCOPES KERN MICROSCOPES SUMMARY TABLE Warranty 2 years on mechanical & optical components. Model Type Eyepiece(s)* Nosepiece Objectives§ Maximum magnification‡ Condenser Diaphragm Illumination† Focusing control** Power supply Catalogue Code Price OBS-101 Monocular x10 W Triple x4, x10, x40 x400 0.65 Aperture LED, variable Coaxial 230 V charger MI170500 £193.75 NA Aperture LED, variable Coaxial + rechg. MI170502 £306.25 Aperture LED, variable Coaxial batteries MI170504 £343.75 OBS-104 Binocular x10 W Quadruple x4, x10, x40 x400 Abbe Aperture LED, variable Coaxial £368.75 (paired) (x1000) Aperture LED, variable Coaxial 230 V charger £425.00 Aperture LED, variable Coaxial + rechg. £450.00 OBS-106 Binocular x10 W Quadruple x4, x10, x40 x400 Abbe Aperture LED, variable Coaxial batteries £512.50 OBE 101 (paired) (x1000) Abbe OBE 111 Abbe 230 V charger OBE 102 Abbe + rechg. OBE 112 Abbe batteries Monocular x10 W Quadruple x4, x10, x40 x400 230 V AC MI160100 Monocular (x1000) Binocular x10 W Quadruple x4, x10, x40, 230 V AC MI160110 Binocular x100 O.I. x1000 x10 W Quadruple x4, x10, x40 x400 230 V AC MI160120 (x1000) x10 W Quadruple x4, x10, x40, 230 V AC MI160130 x100 O.I. x1000 OSE-414 Stereo x10 W n/a x2, x4 x40 No No LED, Incident Coarse 230 V AC MI160200 £168.75 OSE-417 Stereo x10 W n/a x2, x4 x40 No No LED, Incident Coarse 230 V AC MI160210 £243.75 No & Transmitted Coarse 230 V AC OSF-439 Stereo x10 W n/a x1, x2, x4 x40 No Field 230 V AC MI160400 £306.25 Field LED, Incident 230 V AC None & Transmitted 230 V AC OBL 127 Binocular x10 W Quadruple x4, x10, x40, x1000 Abbe LED, variable Coaxial MI160500 £843.75 OBL 137 x100 O.I. x1000 Abbe OZP 556 Trinocular No x10 W Quadruple x4, x10, x40, x55 LED, variable Coaxial MI160505 £968.75 Stereo x100 O.I. Coarse Zoom LED, Incident x10 W n/a x0.6 - x5.5 & Transmitted MI160700 £1,118.75 KERN DIGITAL MICROSCOPES OBD-127 Binocular, x10 W Quadruple x4, x10, x40, x1000 Abbe Field Halogen, Coaxial 230 V AC MI160800 £1,312.50 Digital x100 O.I. variable * W = Widefield § O.I. = Oil Immersion ‡ (x1000) = with optional x100 O.I. objective †I = Incident (from above) T = Transmitted (from below) ** Coaxial = Coarse & fine focusing on one mechanism Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 453

MICROSCOPES Kern Microscopes KERN & SOHN GmbH, established in 1844, have utilised B German design and workmanship to manufacture a range of high quality microscopes for education, research and industrial use. Timstar is offering a selection of mid-range educational microscopes from KERN, along with selected higher level models. The full range from KERN is available from Timstar, on request. Student Microscopes OBS-1 Series Microscopes The KERN OBS-1 series is an education range of robust and simple to use compound microscopes, specifically designed for use in schools. • Illumination: 0.5 W LED transmitted • Rechargeable batteries • Blue colour filter • Finite optical system (DIN) • Achromatic objectives • Eyepiece tube 45° inclined / 360° rotatable • Binocular Dioptre adjustment: one-sided • Overall dimensions: 130 x 300 x 310 mm (W × D × H) • Net weight: 3 kg approx. A BEST SELLER C MI170500 Model Illumination ✓ £193.75 ea MI170502 £306.25 ea MI170504 A OBS-101 LED, variable £343.75 ea B OBS-104 LED, variable C OBS-106 LED, variable 454 …inspiring tomorrow’s scientists through practical science.

Kern Microscopes MICROSCOPES Teaching Microscopes D KERN OBE-1 Series Compound Microscopes C The KERN OBE-1 series offers a high quality, robust range of compound microscopes for use in schools, vocational training and laboratories. These are full-sized microscopes with metal frames and bases, along with a high specification, and are priced to be very competitive compared with other brands with similar specifications. •Features: Very easy to use, robust and stable educational microscope for all • common routine applications Dimmable, strong 3W LED light source to help produce impressive • images for its class Fitted with wide-field eyepieces, achromatic objectives, a nosepiece for up to four objectives, a large, fully-fledged stage and an Abbe condenser, • all as standard Available as a monocular, binocular or trinocular models with a one • sided dioptre adjustment (binocular/trinocular models only) Large selection of optional accessories including eyepieces, objectives, simple polarisation unit and dark field unit • Height adjustment is by means of coarse and fine focusses on both sides • Rechargeable models, equipped with a long-life battery, are also available on request • Stable and precisely adjustable mechanism • Functional and ergonomic design • 3 year warranty Specifications: B • Quadruple nosepiece • 360° rotatable / 30° inclined turret/eyepiece tube • WF 10x eyepiece, 18mm diameter • Achromatic objectives • 4x / 10x / 40x objectives + 100x on some models • 1.25 N.A. Abbe condenser • 3W LED dimmable transmitting illumination • Overall dimensions 324 x 191 x 348 mm (w x d x h) • Net weight approx. 5.5 kg A MI160100 Model Type £368.75 ea MI160110 A OBE 101 Monocular with x4, x10 & £425.00 ea MI160120 x40 objectives £450.00 ea MI160130 B OBE 111 Monocular with x4, x10, x40 & £512.50 ea x100 objectives C OBE 102 Binocular with x4, x10 & x40 £39.54 ea objectives £59.31 ea D OBE 112 Binocular with x4, x10, x40 & £162.50 ea x100 objectives SPARES & ACCESSORIES MI160105 Eyepiece WFx10/Ø18mm with pointer MI160115 Eyepiece WFx10/Ø18mm with scale MI160125 x100 objective for use with water Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 455

MICROSCOPES Kern Microscopes Advanced Microscopes Stereo Microscopes KERN Advanced Microscopes - OBL-1 Series KERN OSE-4 Series Stereo Microscopes A more sophisticated range for use in the laboratory and vocational training, An education line of compact, robust stereo microscopes ideal for schools, these robust microscopes have stable and precisely adjustable mechanisms and training establishment or workshops. produce impressive images in both bright and dark field applications. Features: •Features: • Very robust, stable and easy to use stereo microscope Excellent and robust laboratory microscopes for all common routine • Optimally suited to educational establishments • Excellent optical characteristics for its class, giving clear images over a • applications Fix pre-centred Koehler illumination; adjustable field diaphragm; height broad field of view adjustable Abbe condenser with adjustable aperture diaphragm • LED illumination ensures reliable, good illumination at all times • Wide field eyepieces; with achromatic infinity corrected E-plan objectives • Eyepieces are fixed in the tube, to protect against loss or damage • Complete with dioptre adjustment on one tube • Stable and precisely adjustable mechanism • Available as binocular and trinocular versions • Functional and ergonomic design • Nosepiece with four objectives • Large stage Specifications: • 3W dimmable LED illumination • A variety of optional accessories • Optical system: Greenough • Tube: Binocular, 45° inclined Specifications: • Interpupillary distance: 55 – 75 mm • Dioptre adjustment: Yes, one-sided • Tube: Binocular (OBL 127), Siedentopf, 30° inclined, 360° rotatable • Eyepieces: WF 10x Ø 20 mm • Tube: Trinocular (OBL 137), Siedentopf, 30° inclined, 360° rotatable • Field of view: Ø 10/5mm • Eyepieces: WF 10x / Ø 20 mm • Objectives: 2x / 4x • Nosepiece: Quadruple • Total magnification: 20x / 40x • Objective type: Infinity E-Plan • Illumination: LED incident (OSE-414) or LED incident + LED transmitted • Objectives: 4x/10x/40x/100x • Illumination: Dimmable 3W LED (transmitted) (OSE-417) • Interpupillary distance: 50 – 75 mm • Dioptre adjustment: Yes, one-sided • Stage plate: Black/white (OSE-414; Frosted glass (OSE-417) • Condenser: Abbe N.A. 1,25 pre-centred (aperture diaphragm) • Packing dimensions: 295 x 162 x 345 mm (w x d x h) • Overall dimensions (W x D x H): 395 x 200 x 380 mm • Net weight (approx.): 2.25 kg • Net weight approx.: 6.5 kg MI160200 Model Illumination £168.75 ea MI160210 ✓ £243.75 ea OSE-414 LED, Incident OSE-417 LED, Incident & Transmitted MI160500 Model Type ✓ £843.75 ea MI160505 £968.75 ea OBL 127 Binocular £418.75 ea OBL 137 Trinocular £218.75 ea £400.00 ea SPARES & ACCESSORIES £243.75 ea MI160550 100x objective for use with water £152.50 ea MI160552 Darkfield Condenser MI160554 Phase contrast unit, 40x MI160556 Polarising Unit MI160558 0,47x C-mount adapter for camera attachment 456 …inspiring tomorrow’s scientists through practical science.

Kern Microscopes MICROSCOPES Stereo Microscopes continued KERN OSF-439 Stereo Microscope KERN OZP-556 Stereo Zoom Microscope An education line of compact, robust stereo microscope ideal for schools, A high-quality model for flexible and professional use, the KERN OZP-556 is training establishment or workshops. a very robust and easy to use stereo microscope with a zoom function which is operable from both sides and gives an above-average enlargement range. Features: Ideally suited to biological laboratories and research establishments as well as quality control, assembly and repair workstations in the electronics and semi- • Practical and easy to use stereo microscope conductor industries. • Safe and easy to move thanks to the built-in handle • Robust and stable mechanical stand Features: • Very good optical properties • Ergonomically designed • Robust and easy to use stereo microscope with large zoom function • Optimally suited to educational establishments • Zoom function operable from both sides • Strong LED incident and transmitted dimmable illumination units • Pillar stand • Eyepieces are fixed in the tube, to protect against loss or damage • Powerful and long-life dimmable 3W LED incident and transmitted illumination Specifications: Optical system: Greenough • Dioptre adjustable on both tubes Brightness: Adjustable • Ideal for use in rough working environments, e.g. training, workshops • and production Tube: Binocular, 45° inclined Allows a large depth of field, with little refocussing required for zoom Interpupillary distance: 55 – 75 mm Dioptre adjustment: Yes, one-sided • enlargement Eyepieces: WF 10x Ø 20 mm Provides high-contrast images, an extra-large field of view and is absolutely true-to colour Field of view: Ø 20/10/5mm Objectives: 1x / 2x / 4x • Extra-large working distance, providing a large working area Total magnification: 10x / 20x / 40x • Stable and precisely adjustable mechanism Illumination: Dimmable LED incident + LED transmitted • Functional and ergonomic design Stage plate: Black/white; Frosted glass • A trinocular model is also available on request (model OZP 558) Specifications: Packing dimensions: 290x225x340 mm (w x d x h) • Optical system: Greenough Net weight (approx.): 2.25 kg • Tube: Binocular, 35° inclined • Magnification ratio: 9.2:1 • Interpupillary distance: 52 - 76 mm • Dioptre adjustment: Yes, both sides • Eyepieces: HSWF 10x Ø 23 mm • Field of view: 38.3 - 4.2 • Objective zoom: 0.6x - 5.5x • Total magnification: 6x - 55x • Illumination: Dimmable 3W LED (incident); 3W LED (transmitting) • Brightness: Adjustable • Packing dimensions (W x D x H): 370 x 330 x 385 mm • Net weight (approx.): 6.1 kg MI160400 £306.25 ea MI160700 £1,118.75 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 457

MICROSCOPES Kern Micrcoscopes ● Eyepiece Cameras ● Veho Microscopes Digital Microscopes Eyepiece Cameras KERN Advanced Microscopes - OBD-127 Digital Microscope Eyepiece Camera Microscope Basic microscope eyepiece camera with 2 MP resolution, which connects to a An advanced level digital microscope for use in the laboratory and for PC via the inbuilt USB 2.0 cable. Works with both monocular and binocular vocational training, this robust microscope has stable and precisely adjustable microscopes by replacing the eyepiece. Fits eyepiece tubes with a diameter of mechanisms and produces impressive images in both bright and dark 23 mm or 30 mm (adapter included). field applications. A range of optional accessories are available, including: Comes with software for Windows PCs. polarisation kit; phase contrast unit; dark field unit. Software download: timstar.co/MI170800-driver Features: • 2 MP still resolution • 640 x 480 live resolution • Excellent, robust laboratory microscope with integral 3 MP camera • Fix pre-centred Koehler illumination; adjustable field diaphragm; height adjustable Abbe condenser with adjustable aperture diaphragm • Produces impressive images. • Wide field eyepieces; with achromatic infinity corrected E-plan objectives • Complete with dioptre adjustment on one side • Nosepiece with four objectives • Large stage • English-language software is included. •••••••••••••••SpeTOICIDSOUOECCNSnlucyleeoaoiSoubbptiboennefBmlnsmjejipoepsseercedrpoo:iutteacciape yrenurrttrrtepticiinai/aeipvvosteneMsyateeciinsriez:glpeodsel:o esrta e::njsy::sn : ur: op y:oy s sletcutdm:eht iimsreootnna:m t:n: e ce: : Binocular, 30° inclined, 360° rotatable MI170800 £99.94 ea WF 10x / Ø 20 mm diaphragm) 3MP Field diaphragm: 2.0 Filter: CMOS O verall dimensions 0.5” Colour Windows 2000, Vista, XP, 7, 8 & 10 Quadruple Infinity E-Plan 4x/10x/40x/100x (oil immersion) 6V/20W Halogen (transmitted) 50 – 75 mm Yes, one-sided Abbe N.A. 1,25 pre-centred (aperture ••• Yes Veho Microscopes Blue (built-in) Handheld Microscopes • (W x D x H): 394 x 185 x 419 mm Net weight approx.: 7 kg A desktop USB microscope with a wide range of applications, featuring in-built LED illumination, a powerful zoom lens, high resolution camera in a robust rubberised housing with a convenient capture button. Supplied with an alloy stand for hands-free viewing. See skin, fibres, fabrics, electronics, surfaces, animals and many other objects of interest in incredible detail. Includes easy-to-use software for capturing impressive still images and videos, and taking measurement from images. Available in two models: The VMS-001 has a maximum magnification of 20x/200x, and a resolution of 1.3 MP. The VMS-004D has a maximum magnification of 20x/400x and a resolution of 2.0 MP. • Adjustable LED illumination • Software with capture and measurement functions • Alloy stand • Robust rubber housing • Windows and Mac compatible MI160800 OBD-127 £1,312.50 ea Model Magnification Resolution SPARES & ACCESSORIES £418.75 ea MI160550 100x objective for use with water £218.75 ea MI160600 VMS-001 x20, x200 1.3MP £62.44 ea MI160552 Darkfield Condenser £400.00 ea MI160605 VMS-004D ✓ £74.94 ea MI160554 Phase contrast unit, 40x £243.75 ea x20, x400 2MP MI160556 Polarising Unit …inspiring tomorrow’s scientists through practical science. 458

Handheld Microscopes ● Microscope Accessories MICROSCOPES Exploroscope Easi-Scope Hand Held Digital Microscope The simple one-click operation of this USB digital hand- A robust yet compact handheld 1.3 MP digital microscope with LED held microscope allows students to capture an image and illumination, USB2 connection and Motic application software. record their findings. View images live on both TV and PC (windows and MacOS), and therefore an AV and USB Practical Pre-School Silver Award Winner 2009. Shortlisted for an Education cable is included for class viewing. Ideal for looking at: Resource Award 2009 - Secondary Resources and Equipment - using ICT. This parts of the body e.g. skin, hair, nails, fingerprints; living simple plug and play device attaches to your computer via USB. Easi-Scope has and natural things e.g. mini beasts, leaves, fruit, bark, an LED light to help illuminate items being viewed. snake-skin, fur, wood, leaves, fruit and pine cones; man- made materials e.g. fabrics, foam, metals and paper. Simply hold the Easi-Scope over the object, focus by turning the top then take Features: videos or still images using the single control button at up to x 43 magnification • Magnifies up to 50x (using a 17” monitor). • Resolution 640 x 480 pixels Features: • Simple one click operation to take still image • Button switch to operate LED as required • Dimensions: 70 x 50mm • Compatible with Windows and Mac • Child friendly microscope • Dimensions (L x W x D): 210 x 100 x 60mm • Investigate materials • Share with the whole class MI140100 £31.19 ea MI130925 £62.47 ea Easi-Scope 2 Easi-Scope 2 - your Wireless alternative. Now with built-in Wi-Fi! Unveiling a pioneering extension to the world of magnification. A fully independent device that is recharged via USB and offers total flexibility within your classroom indoors and out! Key Features: •10 metre range •Larger device which is easier to hold and investigate with little hands •Digital transmission on 2.4Ghz for perfect picture quality •Hidden antenna, aids ease of use •Communicates with a radio device which is plugged in via USB MI150820 £94.35 ea Microscope Accessories Microscope Lamps Complete Eyepiece with Graticule £74.94 ea ✓ £149.94 ea Microscope Lamp Complete eyepieces contain a measuring graticule. Suitable for all Motic Microscopes. (Not shown). £149.94 ea The lamp housing is attached to a 200mm high pillar Diameter: 18 mm. ✓ £87.44 ea on a metal base with a boss allowing adjustment in any direction. Removable hood has a 40mm aperture fitted MI74145 with a blue filter. Type Power Voltage Stage Graticules Microscope Lamp 40 W 240 V The micrometer scale is disc 40 W 240 V mounted on a black metal slide. Suitable for all microscopes. Dimensions: 76 x 25 mm. MI10650 £74.94 ea £1.19 ea SPARES & ACCESSORIES Graduation MI10655 £49.94 pk Spare Bulb MI10710 10 x 0.1 mm MI10715 1 x 0.01 mm Graticules Stage Micrometer Plastic Eyepiece Graticules The micrometer scale is disc mounted BEST on a black glass slide. Suitable for all These measuring graticules are printed microscopes. Slide comes with 2 scales: SELLER onto plastic film. They have a 0-10mm 10 mm x 0.1 mm and 1 mm x 0.01 mm. scale subdivided into 0.1mm divisions, Dimensions: 75 x 25 mm. each of the millimetre subdivisions are numbered 0-10. Suitable for most MI130520 school microscopes. MI84165 Quantity Stage Micrometer, Economy Supplied in 2 strips of 5 graticules An economical but good quality glass Glass Eyepiece Graticule stage micrometer slide, with a 1.0 mm long x 0.01 mm scale marked on the glass. Mounted on glass discs 19mm diameter to fit most eyepieces. MI10700 Graduation £79.94 ea Quantity ✓ £13.13 ea 10 x 0.1 mm MI170400 ✓ £124.94 pk MI170400/10 10 Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 459

MICROSCOPES Microscope Accessories Blood Testing Haemacytometer, Glass Blood Lancets These Bright-Line (Rhodium coated) glass Haemacytometers are designed for accurate counting of cells in blood or other fluids, with one-piece glass For capillary blood collection. Chromium construction, an H-shaped moat to form two counting areas (plateaus) and a steel. Packaged individually. Sterile. “V” slash at the loading side of each plateau. Each plateau features enhanced Neubauer rulings, the ruled surface being 0.1 mm below the cover glass, MI10855 Quantity £10.91 pk limiting the volume of blood or fluid over a square mm to 0.1cu.mm and MI10860 £3.69 pk over each of 400 squares (within the central square mm) to 0.00025 cu. mm. 200 Contact of the flat, polished cover glass surfaces with cover glass supports 100 produces an exact volume of fluid over the counting area. The difference in surface tension characteristics between the metallic surface on the chamber Medical Swabs, Sterile and the polished cover glass assures smooth capillarity for precise loading and more even cell distribution. For cleaning the skin. Supplied as a double chamber with two cover glasses or a kit which includes a double counting chamber, cover glasses and red and white pipettes, all in a protective case. Spare/replacement glass cover glasses are also available, as a pack of 2. • Bright Line (Rhodium coated) counting chamber • Improved Neubauer ruling pattern • Cell Depth: 0.100 mm ±2 % • Volume: 0.1 µL To clean the counting chamber after use: remove the cover glass and clean with water or a mild cleaning solution (e.g. 10% bleach solution). Dry the counting chamber with a soft cloth/wipe, or rinse with acetone. MI160320 Type ✓ £118.69 ea MI160322 £93.69 ea Double cell chamber set £17.13 pr Double cell counting chamber with cover glasses MI10860 Quantity £3.69 pk SPARES & ACCESSORIES Dimensions 100 Type 20 x 26 x 0.5 mm MI160324 Spare cover glasses, pair Haemacytometers Microscope Slide Staining Haemacytometer, Disposable Hand Microtome The C-chip™ is an easy-to-use, precision disposable plastic haemocytometer, For section cutting. The milled head at the base when revolved records developed to solve the problem of conventional glass haemocytometers. 10 microns per click. Supplied individually packed, in a box of 50 slides, these Neubauer Improved Brass top plate 75 mm diameter. Overall length 85 mm. type haemocytometers have 0.1 mm 0.05 mm grids, for counting blood cells Supplied in a hinged wooden case. (erythrocytes, leukocytes), mammalian cells etc. Supplied as a box of 50 double chamber slides (100 tests). MI11125 £60.85 ea Features and benefits: Staining Block (Cavity) • No need to coverslip • No need to wash for reuse Clear polished glass, 6 mm deep cavity • No more contact to hazardous materials with flat glass cover. • Accurate, reliable and repeatable • Bright grid pattern • 2 tests per slide • Pack of 50 double chamber slides (= 100 tests) • Quartz grade optical plastic • Sturdy and strong Main applications: • Blood analysis • Cell culture; cell concentration measurement and cell viability counts • Microbiology; bacterial and fungal spores Dimensions: 25 x 75 x 1.6 mm (w x l x t) Chamber depth: 100 µm Chamber volume : 10 µL Quantity £116.08 pk MI11145 Dimensions £4.04 ea MI160300 50 40 x 40 mm 460 …inspiring tomorrow’s scientists through practical science.

Microscope Accessories MICROSCOPES Microscope Slide Staining continued Microscope Slides Staining Trough Microscope Slides, Value Glass with lid. To hold 20 slides. Washed with 45° ground edges. External cellophane wrapping, interleaved. Dimensions: 76 x 26 mm. MI11165 Dimensions £12.75 ea 76 x 26 mm Coplin Staining Jar Glass with lid. To hold 20 slides. MI10901 Thickness Quantity £2.34 pk 1.0 to 1.2 mm 50 MI11155 Dimensions £14.39 ea Microscope Slides 76 x 26 mm £8.56 pk Washed with 45° ground edges. Internal cellophane wrapping with easy-open Microscope Slide Cover Slips ✓ £1.86 pk tear strip. Dimensions: 76 x 26 mm. £2.50 pk MI10906 Thickness Quantity £3.30 pk MI10907 ✓ £2.95 pk MI10908 0.8 to 1.0 mm 50 1.0 to 1.2 mm 50 £3.64 pk 1.2 to 1.5 mm 50 Microscope Cavity Slides Microscope slides with round, polished 15mm diameter cavity. MI120100 Dimensions Quantity £16.88 pk 76 x 26 x 1.2 mm (L x W x D) 50 Cover Slips No.0 Microscope Slides, Frosted Panel Resistance Glass 0.09 to 0.13 mm thick. Glass microscope slides with a single frosted panel to allow marking of the MI10925 Dimensions Quantity slide. These come with tissue paper MI10930 separating each slide and have MI10935 19 mm diameter 100 ground edges. 1.0 mm thickness. 18 x 18 mm 100 22 x 22 mm 100 Cover Slips No.1 Resistance Glass 0.13 to 0.16 mm thick. MI10940 Dimensions Quantity £8.75 pk MI10945 ✓ £1.45 pk MI10950 19 mm diameter 100 18 x 18 mm 100 £2.17 pk 22 x 22 mm 100 Cover Slips No.1½ MI104176 Dimensions Quantity £3.45 pk 76 x 26 mm 50 Resistance Glass 0.16 to 0.19mm thick. MI11025 Dimensions Quantity ✓ £1.58 pk Microscope Slide Folders MI11030 £2.17 pk MI11035 18 x 18 mm 100 £2.71 pk Microscope Slide Folder MI11040 20 x 20 mm 100 £2.88 pk MI11050 22 x 22 mm 100 £3.14 pk Two hinged flaps and numbered positions. 22 x 26 mm 100 22 x 40 mm 100 Cover Slips No.2 Resistance Glass 0.19 to 0.25mm. MI11066 Dimensions Quantity ✓ £1.94 pk MI11071 £4.94 pk 18 x 18 mm 100 22 x 22 mm 100 Cover Glass Forceps Stainless Steel with Spatula ends. MI11075 £1.55 ea MI11100 Type Dimensions £9.30 ea To hold 20 slides 76 x 26 mm Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 461

MICROSCOPES Microscope Accessories ● Microslide System Microscope Slide Boxes Microscope Slide Box, Plastic B Microscope Slide Box Made from tough plastic. Numbered slots for 25, 50 or 100 slides. Leatherette covered wood, with hinged lid, wooden racks and numbered name A sheet. Type C To hold 100 slides MI11110 £54.21 ea Immersion Oil (Microil) OI4384 QlacimehC uantity £6.70 MI104170 Type £4.15 ea 25 mL MI11115 £5.80 ea MI104172 A To hold 25 slides £14.04 ea B To hold 50 slides C To hold 100 slides Microslide System Top quality specimens are photographed under optimum conditions, magnified, labelled and turned into strips of colour transparencies in sets of related pictures. The notes are clearly and precisely written with all the important words highlighted. The viewers are tough, child-proof magnifiers. They can also be used as simple low-power microscopes for examining soil samples, pollen, parts of flowers, small insects, etc. • Superb Quality photographs • Every student looks at the same image • No searching or focusing problems • No breakages • Students can work at their own rate Bioviewers Microslide Viewer (Bioviewer) BioViewers are tough styrene instruments, almost unbreakable and made for years of wear in classroom conditions. They do not need any special treatment or care, they can even be washed. No lamp is needed; the white reflector stage provides sufficient light for a bright image. They can be used in any room at any time or even outdoors. With BioViewers you can stop worrying about expensive apparatus in inexperienced hands. ...low maintenance OUR EXPERTS SAY... product that will never let you down. Much under rated, the Bioviewer is robust and can be used in the field or classroom environment. MS88800 £21.24 ea 462 …inspiring tomorrow’s scientists through practical science.

Microslide System MICROSCOPES Biosets Each BioSet consists of a strip of 8 photomicrographs and a text folder to explain them. A BioSet consists of a strip of 8 related photomicrographs (pictures taken through a microscope) and a folder to explain. The photomicrographs are encased in unbreakable plastic and supplied in sets of 10 identical titles. Only the best slides are photographed at whatever magnification is needed to explain the specimen. When viewed through a BioViewer every slide is exactly as seen through a microscope under ideal conditions. Microslides Microslides are sets of 8 related 35mm images, as photographed through a microscope, and designed to be viewed through a Microslide Viewer (Bioviewer – MS88800). Arrows and callouts help the students locate important features being studied, accompanied by a detailed text folder designed to stimulate, inform and question the students about the topic. Each text folder has a handy pocket to store the Microslides. Supplied in packs of 10. MS80142 Type £118.69 pk MS80056 Type £118.69 pk MS80016 £118.69 pk MS160045 £118.69 pk MS80024 Leaf of the Flowering Plant £118.69 pk MS160065 Malaria £118.69 pk MS80036 Human Blood £118.69 pk MS88874 Immunity £118.69 pk MS80046 Digestive System £118.69 pk MS160080 Human Diseases £118.69 pk MS80048 Human Meiosis £118.69 pk MS160085 Five Kingdoms of Life £118.69 pk MS80110 Chromosomes and Genes in Action £118.69 pk MS80132 Animal Tissue Set 1 - Epithelium & Cartilage £118.69 pk MS80120 Parasites and other causes of disease £118.69 pk MS80146 Animal Tissue Set 2 - Muscle, Bone, Connective £118.69 pk MS80170 Cell Structure £118.69 pk MS160090 Plant Mitosis £118.69 pk MS80200 The Virus £118.69 pk MS80028 Photosynthesis £118.69 pk MS160015 Ultra-Structure of Animal Cells £118.69 pk The Reflex Arc MS160020 Green Plants £118.69 pk The Respiratory System MS160025 Helpful Bacteria £118.69 pk MS80044 Harmful Bacteria £118.69 pk Body Defences Against Infection Drug Abuse Under Microscope To view the entire range of biosets, go online to appreciate the quality of these photomicrographs. Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 463

MICROSCOPES Travelling Microscopes NEW Intermediate Vernier Microscope The unit is built on a heavy cast-iron base. The movement is controlled by a knob at the side of the base, and can be fixed in any position with a clamping screw, and a Vernier scale allows precise measurement to 0.01 mm. The carriage has two locations for the microscope, which allows it to be mounted with its axis in any position relative to travel. The microscope itself features a 7x magnification Ramsden objective, 3x magnification 50 mm FL eyepiece, and a cross-piece graticule, with rack-and-pinion focusing. Supplied in a polished wooden case. MI180000 ✓ £343.69 ea Advanced Vernier Microscope NEW The unit is built on a heavy cast-iron base with three levelling screws, with a bubble level meter. The horizontal movement is controlled by a knob at the left hand side of the base, and can be fixed in any position with a clamping screw, and a Vernier scale allows precise measurement to 0.02 mm. The total horizontal movement is 210 mm. Vertical movement is by a rack-and-pinion, and has its own Vernier scale to 0.02 mm. The total vertical movement is 160 mm. The stage for placing objects for measurement is fitted with a Perspex plate. The microscope can be clamped in either a vertical or horizontal position, and features a 10x magnification 50 mm F.L. achromatic eyepiece. Supplied in a polished wooden case. MI180050 ✓ £437.44 ea 464 …inspiring tomorrow’s scientists through practical science.

465 PHYSICS Astronomy466 Forces & Motion 517 Molecules in Motion 534 Atoms & Nuclei 468 Optics 541 Physical Quantities 565 Electrostatics478 Vibrations & Waves  568 Oscilloscopes 580 Electromagnetism484 Magnetism490 Magnets493 Energy 498

PHYSICS Astronomy Planetary Motion Solar System Orbit Tellurium 2 Orbit Orrery A model showing the Sun, Earth and Moon, correctly geared to show each This hands-on model with teaching guide helps pupils understand the solar month as the Earth orbits the Sun. The Sun is represented by a bright lamp. It system including its shape, the sun as the source of its light, planetary orbits, is particularly useful in demonstrating: Sun’s apparent motion: changing length the planets’ names and which planets may be seen on given days. Requires and direction of shadows during a day and during a season; night and day; 2xAA batteries to light the sun. Dimensions (H): Height 100mm. Diameter of changing length of days; seasons; phases of the Moon; eclipses of the Moon largest Orbit 380mm. and Sun. Dimensions (L x H) 650 x 250mm. Content includes: • Tellurium model • Stick-on model person • Model sundial • Earth axis extension • Two Earths and Moons • Date indicator • Phase of the Moon indicator • Eclipse shadow card, teaching guide • Electrical Operation: 6V transformer supplied EA18220 £28.78 ea SPARES & ACCESSORIES £1.95 pk BA01983 2 x AA Batteries Solar System Poster Set A complete set of laminated posters, showing the Sun and nine planets. Each print shows a planet at its correct relative size and characteristics. When hung on a wall the set will give an impression of the overall relative size of the solar system. EA18225 £301.71 ea EA18235 Quantity £34.19 set 10 Helios Planetarium The Sun A working model of the planetary system which combined with a star dome AstroSolar® Solar Viewer Silver/Gold makes a versatile aid for teaching basic astronomy. On a circular 360mm dia base, model planets orbit at the correct relative speeds around the Sun, and These viewers offer a safe, easy and comfortable way to make solar the Moon orbits the Earth. The planets can be positioned for any year or month observations, allowing viewing of partial phases of solar eclipses, and even up to 2020. Can also be used to demonstrate the seasons. Tides and stars are large sun spots, with your own eyes. seen from different latitudes. Supplied with a full information guide. Comprises AstroSolar® silver/gold film, with eye-sided reflex-free viewing, which blocks both UV for safety, and IR for comfort. NEW • 100 % UV block • 100 % IR block • 99.999 % reduction sun light intensity • Optical Density 0.5 • Conforms to EN ISO 12312-2:2015 • Instructions included • Made in Germany EA18240 £702.63 ea SU180100 ✓ £4.94 ea 466 …inspiring tomorrow’s scientists through practical science.

Astronomy PHYSICS Telescopes Refractor Telescope, Reflector Telescope, Refractor Telescope, Mercury-607 Explorer-150P Capricorn-70 (EQ1) • 60mm (2.4”) f/700 Achromatic Refractor • 150mm (6”) f/750 Parabolic Newtonian • 70mm (2.75”) f/900 Achromatic Refractor • Magnifications (with optics supplied): x35, • Reflector • Magnifications (with eyepieces supplied): x36, x70, x140 Magnifications (with eyepieces supplied): x30, x72, x90, x180 x60, x75, x150 • Objective Lens Diameter: 60mm • Highest Practical Power (Potential): x140 • Telescope Focal Length: 700mm (f/11.66) • Highest Practical Power (Potential): x300 • Objective Lens Diameter: 70mm • Eyepieces Supplied (1.25”): 10mm & 20mm • Diameter of Primary Mirror: 150mm • Telescope Focal Length: 900mm (f/12.8) • x1.5 Erecting Eyepiece • Telescope Focal Length: 750mm (f/5) • Eyepieces Supplied (1.25”): 10mm & 25mm • x2 Barlow Lens 1.25” • Eyepieces Supplied (1.25”): 10mm & 25mm • x2 Barlow Lens • 5x24 Finderscope • x2 Deluxe Barlow Lens 1.25” (with Camera • Red Dot Finder • 1.25”/31.7mm Star Diagonal • 1.25”/31.7mm Star Diagonal • Fully Coated Optics Adapter) • Multi-Coated Objective Lens • Alt-Azimuth Mount • EQ1 Equatorial Mount • Aluminium Tripod with Accessory Tray • Parabolic Primary Mirror • Aluminium Tripod with Accessory Tray • Tube material: Aluminium • 0.5mm Ultra-Thin Secondary Mirror Supports • Tube material: Aluminium • 6x30 Finderscope • 36% more Light Gathering than 60mm • Direct SLR Camera Connection • EQ3-2 Deluxe Equatorial Mount • Built-in Polar Alignment Scope Holder • Aluminium Tripod with Accessory Tray • 33% more Light Gathering than 130mm • Tube material: Aluminium BEST SELLER TE96314 £156.25 ea TE96334 ✓ £86.25 ea TE96330 £437.50 ea ASTRONOMICAL DATA 1 Astronomical Unit (AU) = the mean distance from the Sun to Earth 1 Light Year (ly) = 9.4605 x 1012 km = 5.8785 x1012 miles = 63240 AU = 31 557 600 light seconds 1 Light second = 299 792 km = 299.79 x 106 (299 792 458) metres = 186 261 miles = 0.002004 AU OUR SOLAR SYSTEM PLANETS – in order of distance from the Sun Age: 4.57 billion years (4.57 x 109 years) Mercury - Diameter: 4 879 km = 3 032 miles. Galaxy: Milky Way Distance from Sun: 57.909 x 106 km. Gravity (g): 3.76ms-2 Venus - Diameter: 12 104 km = 7 521 miles. SUN Distance from Sun: 108.208 x 106 km. Gravity (g): 8.77ms-2 Earth – Diameter: 12 756 km = 7 297 miles. Distance from Earth (mean): 149 597 870 km = 1.4959787 x 1011 Distance from Sun: 149.598 x 106 km. Gravity (g): 9.81ms-2 metres = 92 960 116 miles = 1AU Mars – Diameter: 6 792 km = 4 220 miles. Mass: 1.989 x 1030 kg Distance from Sun: 227.937 x 106 km. Gravity (g): 3.8ms-2 Diameter: 1 392 530 km = 8.653 x 105 (865 318) miles Jupiter – Diameter: 142 984 km = 88 850 miles. Temperature at surface: 5770K = 5497˚C Distance from Sun: 778.341 x 106 km. Gravity (g): 24.9ms-2 Temperature at centre: 15 600 000K = 15 599 727˚C Saturn – Diameter: 120 536 km = 74 901 miles. Gravity at surface (g): 274ms-2 – i.e. approx. 28 times that at the Distance from Sun: 142.6730 x 107 km. Gravity (g): 10.4ms-2 surface of the Earth Uranus – Diameter: 51 118 km = 31 765 miles. Distance from Sun: 287.0658 x 107 km. Gravity (g): 10.4ms-2 EARTH Neptune – Diameter: 49 528 km = 30 777 miles. Distance from Sun: 449.8396 x 107 km. Gravity (g): 13.8ms-2 Diameter: 12 756 km = 7297 miles Pluto* - Diameter: 2 390 km = 1 485 miles. Mass: 5.974 x 1024 kg Distance from Sun: 590.64 x 107 km. Gravity (g): 4.0ms-2 Distance from Sun (mean): 149.598 x 106 km = 92 960 116 miles = 1AU Gravity at surface (g): 9.81ms-2 * Now reclassified as a dwarf planet MOON Diameter: 3475 km = 2159 miles Mass: 7.348 x 1022 kg Distance from Earth (mean): 384 400km = 238 866 miles Gravity at surface (g): 1.62 ms-2 Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 467

PHYSICS Atoms & Nuclei Atoms Ionising Radiation “Proton” And “Neutron” Demonstration Alpha Particle Scattering Apparatus This set is designed to demonstrate the stabilizing effect of neutrons on the A low cost apparatus for the demonstration of Rutherford scattering by means atomic nucleus. of a gravitational analog of inverse square law repulsion. Comprises a wooden The “protons” are made of disc magnets while the “neutrons” are made of launching ramp with a guiding groove running down its curved front face browned iron discs. The “protons” will, because they are magnetized, repel one along its length and index marks at 40, 60, 80 and 100mm height above the another when placed on a flat surface or overhead projector. The stabilizing base, that provides 4 pre-determined launching heights. Also included is a effect of the “neutrons” is illustrated by placing them between the “protons”, spun aluminium hill along with a 19mm diameter steel ball. The shape of the thereby eliminating the repulsive force. The “protons” are supplied with a red aluminium hill has been carefully determined by varying its height above the marking, the “neutrons” with blue. Supplied as single pieces. base line by an amount arrived on the basis of the reciprocal of the radius. Ramp Dimensions (L x W x H): 300 x 50 x 105mm. Hill Dimensions (Dia. x H): 280 x 60mm. RA95600 £64.40 kit MO150900 Type £1.75 ea Radiation Film Badge (Dosimeter) MO150905 £2.81 ea Proton Radiation Film Badge Dosimeters are routinely used by workers to monitor Neutron radiation exposure and these badges can be opened to show the different types and thicknesses of filters contained within. Chain Reactions The badge has six filters: Chain Reaction Apparatus • An open window which allows all incident radiation that can penetrate the This apparatus has been designed as a means to demonstrate a chain reaction, using ordinary matches. film wrapping to interact with the film. A thin plastic film which attenuates beta The apparatus consists of an aluminium plate with holes and a mounting rod. radiation but passes all other radiations One side of the plate has a level surface but the other side has concentric protective channels milled out of the solid aluminium. Six metal pins are •A thick plastic filter which passes all but the lowest energy photon radiation included for damping the chain reaction. Ordinary matches are required for the demonstrations but are not supplied as and absorbs all but the highest beta radiation. standard. Experiments should preferably be carried out in a fume cupboard, due to •A dural filter which progressively absorbs photon radiation at energies below amount of smoke generated by the matches burning. Please note: each experiment uses approx. one small box of matches. 65 keV as well as beta radiation. The apparatus can be used to demonstrate: An uncontrolled chain reaction; a controlled chain reaction; •A tin/lead filter of a thickness which allows an energy independent dose a partly controlled chain reaction. response of the film over the photon energy range 75 keV to 2 MeV. Replacement metal pins are available separately. •A cadmium lead filter where the capture of neutrons by cadmium produces gamma rays which blacken the film thus enabling assessment of exposure to neutrons. Please note that these badges are not functional, and are supplied without film. They are for demonstration purposes only. RA170200 £62.44 ea SPARES & ACCESSORIES £13.69 pk RA170205 Spare Pins RA105600 £11.86 ea Radioactive Sources Smoke Alarm, Ionisation Half Life Simulation An ionising smoke detector uses a radioactive isotope (usually americium 241) This pack of 500 x 10 mm plastic cubes is used to investigate and demonstrate to detect smoke within an ionisation chamber. It contains a very small quantity half-life. Each cube has one black face, the other faces all being yellow. The of the isotope, approximately 1 µCi in activity. cubes are thrown or scattered like dice and those which land with the black face uppermost represent radioactive nuclei which have decayed. The black The majority of the emission is via alpha decay, which does not penetrate the upward facing cubes are then removed, the remaining cubes thrown again and housing of the detector, with a weak gamma ray by-product, which has an the process repeated. The removed cubes represent radioactive decay and a energy of approximately 59.54 keV. decay curve can be plotted from the results. With a well-known gamma energy, it can be used to calibrate the RadAngel BEST gamma ray spectrometer. SELLER AS a consumer device, it does not NEW require any special safety, storage or disposal considerations, and is part of the Standard School Holding of radioactive materials. The detector takes a 9 V battery, however for the purposes of radioactivity investigations, the battery does not need to be installed. Please note: image for illustrative purposes only. RA180910 ✓ £12.44 ea RA75750 ✓ £82.15 set 468 …inspiring tomorrow’s scientists through practical science.

Atoms & Nuclei PHYSICS Ionising Radiation continued Radioactive Source Handling Tongs Protactinium Generator Custom designed tongs for handling the radioactive sources RA95622 - RA95626. The Protactinium Generator is ideal for demonstrating radioactive decay. The Stainless steel construction. Dimensions half life of the isotope is short enough that students can complete the decay (W x L): 12 x 165mm. curve within a single lesson and is perfect for use with a datalogger and GM tube sensor or a standard GM tube and counter. BEST The generator is completely sealed in a leak proof enclosure and consists of uranyl nitrate and an organic solvent. These settle into two distinct layers but SELLER when shaken together react and produce a short term burst of beta radiation with a half life of the order of about 1 minute. This can be observed using a RA110110 ✓ £13.41 ea GM Tube with either a counter or datalogger. The generator comes complete with an SDS and has a recommended storage period of up to 8 years. Radioactive Source Cabinet, Economy Specifications: This strong, lockable cabinet in painted steel offers • Radioactive Half Life: 70€s a compact and more economical storage solution • Experiment Time: 5 to 10 minutes for radioactive sources. The enclosure comes with • Radiation Type: Beta Decay of Pa234 a lock and two keys. Weight: 10 kg. Dimensions • Maximum Product Lifetime: 8€Years (L x W x H): 35 x 25 x 25 cm. • Active Ingredient: Uranyl Nitrate RA115600 BEST ✓ £322.95 ea SELLER Radioactive Rock Specimens BEST The set comprises 6 different minerals (uraninite, thorianite, euxenite, allanite, SELLER pyrochlore and rødberg, red rock from the Fens Formation in Norway) containing uranium, thorium, yttrium and/or cerium in various combinations ST130650 ✓ £118.75 ea and quantities. The minerals produce from a weak to a strong reading on a GM sensor or counter and are excellent alternatives to artificial sources. Radioactive Storage Cabinet, Premium NEW An enamelled sheet-steel cupboard with a lockable, vented door. Comes with 1 narrow fixed steel shelf, 2 holes at the rear for wall mounting and standard international warning sign. Dimensions (H x W x D): 38 x 38 x 38 cm. RA180000 ✓ £112.44 set ST68600 £249.94 ea The following are sealed radioactive sources, the radioactive Radioactive Storage Cabinet with material being enclosed in foil and fixed within a metal Combination Lock cylinder with 4mm diameter stem for mounting purposes. There is also wire gauze across the open end of each cylinder, A strong steel cabinet with a combination lock, for added protection. Each source comes supplied in a small suitable for storing radioactive sources etc. Supplied lead container within a labelled MDF box with hinged lid. with a yellow radioactive warning sign. Can be wall mounted. Radioactive Source Americium 241 Dimensions: 38 x 30 x 30 cm. 5 µCi (185 kBq) of americium-241 incorporated in a silver-palladium disc ST170100 £149.94 ea which transmits a substantial proportion of the alpha particles and a small amount of low energy gamma emission. Half-life: 458 years. RA95626 ✓ £843.75 ea Radioactive Source Strontium 90 Hazard Warning Tape 5 µCi (185 kBq) of strontium-90 in equilibrium with its daughter nuclide Self-adhesive vinyl tape. Supplied in a continuous roll. Text and symbols in yttrium-90, incorporated in a silver disc allowing the major proportion of black. Dimensions (L x W): 66 metres x 25mm. the beta radiation to emerge. Emission: Half-lives: strontium-90: 28 years; yttrium-90: 64 hours. RA95622 ✓ £843.75 ea Radioactive Source Cobalt 60 LA09786 Caution Radioactive Material £10.05 ea 5 µCi (185 kBq) of cobalt-60 and is covered by an aluminium disc to shield beta particles so that only gamma radiation is emitted. Half-life: 5.26 years. RA95624 ✓ £843.75 ea Warning Signs Vinyl, self adhesive. Dimensions (W x H): 20 x 30 cm. BEST SELLER SA27060 Type £7.01 ea Radiation Risk Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 469

PHYSICS Atoms & Nuclei Ionising Radiation continued RadAngel for Schools™ (RA4S™) is a high resolution gamma ray spectrometer, which makes Cadmium Zinc Telluride (CZT) technology available to schools for the first time. RadAngel for Schools This is a completely self-contained entry-level gamma ray spectrometer, which is compact and easy to set-up and use, making it ideal for education. The apparatus features a 5x5x5 mm CZT detector, which enables room temperature operation with excellent resolution. The working temperature is 10-40 °C An audio output on the unit “clicks” for each event, and the loudness of each click depends on the energy of the event. The clicks can be heard using headphones connected to the unit, or via a loudspeaker connected via an amplifier for class demonstrations. A blue LED on the housing flashes to indicate each incident. Data can be output via USB (cable included), and readings taken using free- to-download K-Spect™ software. The software can be projected on a screen for class demonstrations. The unit is powered by USB, so no external supply is required. ••••• Range: 40-1500 keV keV Resolution: 3.5 % FWHM @ 662 Noise: <0.1 events/s Dimensions: 90 x 55 x 25 mm Weight: 135 g RA170100 £687.50 ea Ratemeter Ratemeter This ratemeter/geiger counter is a robust, portable and compact unit capable This ratemeter/geiger counter is a battery operated portable GM-counter ideal of detecting alpha, beta and gamma radiation and recording events on a for field use and equipped with a built-in GM-tube. The built-in GM-tube is re-settable digital counter. It has an integral Geiger-Muller (GM) tube which sensitive to alpha-radiation, beta-radiation, and gamma-radiation. Developed is maintained at high voltage by a small electronic inverter. Events register as and designed especially for educational purposes. audible clicks as well as a visible count on a small LCD. The unit is powered by a single alkaline PP3 battery. • 8 fixed count periods (1, 10, 20, 30, 40, 50, 60 or 100’s) • Display of dose rate (µSv/h) reduced to Cs-137 • Max, min and average view for µSv/H and CPS RA85630 £424.94 ea SPARES & ACCESSORIES £3.83 ea BA01970 PP3 Battery Frederiksen Spark Detector RA75825 £406.25 ea SPARES & ACCESSORIES £3.83 ea The Alpha particle Spark Detector from Frederiksen has been developed to BA01970 PP3 Battery enable visualization of alpha particles. The apparatus can be likened to a GM tube, but using atmospheric air instead of the diluted quenching gas in the Ionization Chamber tube. Demonstrate the ionization of air by alpha particles with this ionization When alpha particles ionize the air in the spark gap of the detector, bright chamber in combination with an electrometer EL150840 and an alpha source sparks can be both seen and heard. The apparatus incorporates a transparent RA95626. lid, which allows clear observation of the sparks. The detector requires connection to a safe high voltage (EHT) power supply with a voltage range of 0-5 kV or 0-6 kV. The apparatus can be safely used directly on a bench top or table and includes a removable threaded steel rod for mounting the unit on a radioactivity bench (RA95610) or squat retort base with thumbscrew (ST96274). • Gives clearly visible and audible response to alpha • radiation D emonstrates the ionization • of air by alpha particles D etects alpha radiation from radioactive minerals or • radioactive sources Allows study of range in air & shielding by different materials RA170300 £137.44 ea RA150000 £49.94 ea 470 …inspiring tomorrow’s scientists through practical science.

Atoms & Nuclei PHYSICS BEST Ionising Radiation continued SELLER Spark Discharge Apparatus An instrument useful in showing the random nature of radiation, it produces spectacular bright sparks when alpha particles are ionised between the electrically charged circular wire grid and steel electrode. It comes complete with sliding holder for an alpha radiation source, an accurate scale to measure the effects of distance between the source and the grid and is built in a vacuum formed black plastic case. All of the electrical connections from an EHT power supply are through 4mm insulated sockets. Connections to a Timer Scaler and Frequency Meter are via a BNC to BNC cable. Requires a 5kV EHT power supply and alpha radiation source. Weight: 400g. Dimensions: (L x W x H) 310 x 77 x 85mm. RA95605 ✓ £243.75 ea Scaler Timer Frequency Meter A multi-purpose instrument, combining the functions of a multi-purpose timer, a ratemeter and a frequency meter in one compact unit. It can be used as a simple stopwatch to more sophisticated applications such as dynamics experiments with air tracks etc. The scaler and ratemeter modes allow numerous radioactivity experiments to be undertaken. It has four, 7-segment LED digits 13 mm high. The high brightness and large size display make it ideal for classroom demonstrations. The microprocessor based design minimises the number of controls required and these are clearly labelled so that the instrument is very straightforward to use. The GM tube input is a TNC socket, and a TNC-to-BNC adaptor is included for connecting a GM tube with a BNC plug. Timer - Four Auto Ranges: 0 to 9.999 s, 10 to 99.99 s, 100 to 999.9 s, 1000 to 9999 s Scaler - Three Auto Ranges: 0 to 9.999 x 1000 counts, 10 to 99.99 x 1000 counts, 100 to 999.9 x 1000 counts Accuracy: ±0.01% Sensitivity: 160 mV peak Ratemeter - Three Auto Ranges: 0 to 9.999 x 1000/s, 10 to 99.99 x 1000/s, 100 to 999.9 x 1000/s Frequency Meter - Three Auto Ranges: 0 to 9.999 kHz, 10 to 99.99kHz, 100 to 999.9 kHz Max Input Signal: 20 V rms Max Sensitivity: 250 mV rms Range: 10 Hz to 1 MHz TI86480 £394.33 ea BNC to TNC adaptor lead ZP1481 GM Tube Allows a GM tube with BNC plug to connect to a Scaler Timer Frequency Meter A sensitive ZP1481 GM tube in a robust plastic housing, with a captive flying with TNC socket. lead terminating in either a TNC or BNC plug. The housing features a screw- thread and rod for mounting in a squat retort base or radioactivity bench. NEW If purchasing for use with the TI86480 Scaler Timer Frequency Meter, the TNC version is recommended. Otherwise, a BNC version is likely to fit other counters and meters. • 17 mm window diameter • 2.5-3 mg/cm3 window thickness • 430 V recommended working voltage • Max background count: 30/min • 120 µs dead time NEW RA180525 ✓ £21.19 ea Scaler Timer BNC Retrofit For owners of the IPC Scaler Timer Frequency Meter with a PET socket, this service is to have your unit retrofitted with a TNC socket. Includes collection and delivery, a full test, as well as a TNC-to-BNC adapter so that a BNC GM-tube can be connected. TI180489 ✓ £93.69 ea RA180900 Type ✓ £374.94 ea RA180902 TNC Plug ✓ £374.94 ea BNC Plug Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 471

PHYSICS Atoms & Nuclei Ionising Radiation continued Geiger-Muller Tube - BNC GM Tube Test Source A multipurpose GM tube, sensitive to alpha, beta and gamma radiation. Mounted in a housing with protective cover and 10 mm diameter support rod. This test source is used to test the β-efficiency of GM tubes. It comprises a 300 ±5 mg potassium chloride, in a 2 x ø13 mm cavity, sealed It is complete with integral lead and BNC connector. This GM tube does NOT with clear film of a specified thickness and density. have a built-in anode resistor, and therefore requires a counter with a built-in This is naturally radioactive due to the presence of 0.0117 % of potassium-40, anode resistor. Suitable for use with RA67530. which has a mean β energy of 560.2 keV. ••• It should be stored away from sunlight as the UV will degrade the plastic. Window diameter: 9.14 mm 500 V Please note that this is NOT considered a radioactive source, and should not be Recommended bias voltage: labelled or stored as such. BNC plug RA67535 £148.75 ea Geiger-Muller Tube, Extra Sensitive - BNC This extra sensitive GM-tube has a large window which makes the detector well suited for measuring low activity sources. This provides more counts and thus improves counting statistics for more accurate determinations of half-lives, etc. The GM-tube housing is supplied with a protective cover as well as a protective grid in front of the window. It is sensitive to alpha, beta and gamma radiation. It is complete with a removable protective cap, holder, and integral lead with BNC plug. This GM tube does NOT have a built-in anode resistor, and therefore requires a counter with a built-in anode resistor. Suitable for use with RA67530. ••• RA170900 £49.50 ea Window diameter: 27.8 mm 575 V Recommended bias voltage: BNC plug Geiger-Muller Counter RA95590 £337.50 ea This GM counter is the most versatile and easily operated model yet. The counting time can be set to 1, 10, 60 or 100 seconds or set to manual start/ stop. Counting may be set to run repeatedly and the last, complete result is displayed in the main display while new counts accumulate in the auxiliary display. The counter accepts both BNC and Jack type GM tubes. With the optional USB connection it can interface with a computer - and if a pulse output for further hardware processing is required, that is also available. For demonstration purposes the authentic clicking Geiger-counter sound may be turned on if preferred. Other improvements over the previous model include a lower overall system dead time and lower current consumption, with the unit now being powered by AA batteries. The counter may also be powered from the optional mains adapter. BEST If purchasing a GM OUR EXPERTS SAY... SELLER tube for leak test and contamination monitoring, it must have a window of at 15 mm diameter to be sufficiently sensitive. A tube with a smaller window can be used for teaching and demonstration purposes. Holder for Extra Sensitive GM Tube Fitted with a 10mm diameter mounting rod, so the GM-tube may be held safely in the squat retort base. RA67530 Type ✓ £437.50 ea Geiger-Muller Counter £24.94 ea £42.44 ea SPARES & ACCESSORIES RA95592 £16.88 ea RA110100 Mains adapter RA120100 PC Communication Lead for GM Counter 472 …inspiring tomorrow’s scientists through practical science.

Atoms & Nuclei PHYSICS Ionising Radiation continued Frederiksen Absorption Plate Set Radioactivity Bench Kit The holder is designed for Frederiksen radioactive sources and is supplied with a set of absorption plates for experiments with radioactivity. It has a 10 mm A bench for radioactive sources and GM-tubes, providing a stable and diameter support rod and a 6 mm diameter rod for hanging absorption plates convenient setup, allowing reproducible results when making experiments with in front of the radioactive source. It can either be carried in a rider on the radioactivity. Investigate how the radioactive radiation spreads from the source radioactivity bench, or in a squat retort base ST96274 (sold separately). in both angle and distance or investigate how radiation is absorbed by lead and aluminium. The absorption plates have a hole in one corner for hanging from the source The bench is 60 cm in length, with a millimetre scale. Two riders are included, holder, and are supplied in a convenient storage box. one for carrying a GM-tube, and the other for carrying the source holder*. The source holder can be fitted with a 6 mm diameter steel rod, for hanging • L ead plates: 5× 2 mm thick, and 10× 1 mm thick (enamelled to protect absorber plates in front of the radioactive source. It can be rotated, and is fitted • from lead contamination) with a degree scale ±110° ×1° Aluminium plates: 2× 3 mm thick, 6× 1 mm thick, and 4× 0.5 mm thick • Lead plates: 5× 2 mm thick, and 10× 1 mm thick (enamelled to protect • from lead contamination) Aluminium plates: 6× 2 mm thick, and 4× 0.5 mm thick *Please note: This holder is only suitable for use with Frederiksen radioactive sources, which are available by special request only. The sealed radioactive sources can be used instead, with some limitations, using a RA170800 source holder. RA95620 £74.94 set £29.94 ea SPARES & ACCESSORIES ST96274 Retort Base RA95610 £218.75 kit Absorption Plates Set, Value Sealed Radioactive Source Holder A set of absorption plates to demonstrate and compare how well different materials block (absorb) radiation from radioactive sources. This holder has been designed to accommodate the sealed radioactive sources. It comprises a tube with 4 mm sockets at either end, into one of which the Plate dimensions are 70 x 70mm, with varying materials and thicknesses, as source is inserted. The sockets are electrically connected, so an electric potential follows: 8 x 1mm thick lead plates; 8 x 1mm thick steel plates; 8 x 2mm thick can be applied to the source. Aluminium plates; 8 x 4mm thick Plexiglas (Acrylic) plates. The holder fits into the RA95592 holder (sold separately) which can then be mounted into a ST96274 squat retort base, or an OP104656 sliding saddle to use on the Radioactivity Bench Kit. RA130520 £43.96 set Frederiksen Absorption Plate Set The absorption plates have a hole in one corner for hanging from the source •holder, and are supplied in a convenient storage box. Lead plates: 5× 2 mm thick, and 10× 1 mm thick (enamelled to protect • from lead contamination) Aluminium plates: 2× 3 mm thick, 6× 1 mm thick, and 4× 0.5 mm thick RA95615 £49.94 set RA170800 £4.94 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 473

PHYSICS Atoms & Nuclei Ionising Radiation continued Dry Ice Maker Diffusion Cloud Chamber The Dry Ice maker produces individual pellets of dry ice from a Carbon dioxide syphon cylinder which has an internal dip tube. Small pellets of dry ice can Continuously operating diffusion cloud chamber for observation of alpha be made whenever and wherever they are required. The unit is screwed onto particle tracks. 50 g of dry ice and 1-2 mL of alcohol will run it for about the outlet oOf naceCOth2e syphon cylinder and is operated by opening and closing 30 minutes. The chamber requires no high voltage sources. Equipped with a the valve. pellet is made and the cylinder valve is closed, the nylon 12 V lamp. Requires dry ice pellet and alpha source RA67515. wrapper is peeled back revealing the dry ice pellet, which can be removed Diameter 120 mm, height 90 mm. wearing protective gloves. Takes approx. 1 minute for the production of one 30g pellet. Specification: • Pellet size formed approx (Dia. X H): 50 x 25mm • Weight approx: 30 grams. • CO2 cylinder not included. RA67510 £174.94 ea Leather Gloves Gauntlet type with heat resisting leather palm, fleece lined. Dimensions (L): 300mm. RA85635 £165.00 ea The Dry Ice Maker requires a carbon dioxide syphon cylinder with an internal dip tube. A suitable cylinder can be purchased from the BOC (British Oxygen Company). The BOC can be contacted on 0800 111 333. SA13455 £7.46 pr 474 …inspiring tomorrow’s scientists through practical science.

Atoms & Nuclei PHYSICS Muons Spare Absorber Plates Muon Observatory A pack of five 148 x 148 x 3 mm steel plates, for use as replacement or additional plates with the Muon Observatory. Every second, each square meter of the Earth is hit by some 10,000 particles originating from cosmic radiation. Most of these are muons produced in the RA170502 £31.19 pk uppermost part of the atmosphere, where even more energetic particles collide with air molecules. Coincidence Box The purpose of the muon observatory is to facilitate the study of these particles. Muons occur as both positively and negatively charged particles. A muon is The coincidence box is used for the detection of simultaneous events in a GM approx. 200 times heavier than an electron. Muons are unstable with a half-life tube and can be used in nuclear physics and in the study of cosmic radiation. It of 2.197 µs. is required in order to use the Muon Observatory correctly. Shower Mode The particles from the cosmic radiation often spread out their energy in a The output of the box sends a pulse to an external counter when two (or three) shower of secondary particles, which in special cases can be enormous and hit of the inputs receives a pulse simultaneously (in reality this means within an area of several square kilometres of land surface. 1 microsecond). In the shower mode setup, a shower is recorded as a coincidence event from three GM tubes arranged in a triangle. This geometry ensures that no The coincidence box can use both conventional GM tubes with BNC connectors single particle can be detected in all three tubes. Evidence of showers may be and GM tubes with 6 mm Jack plugs, provided that the detectors are identical. facilitated by allowing the radiation to pass through something that is slightly Each of the three inputs can be enabled or disabled by means of a switch. The denser than air – e.g. a number of steel plates. device is powered by a mains adapter (included). Telescope mode In telescope mode two (or three) GM tubes are arranged in a line, and if The output pulses are registered by a GM counter (RA67530) or the Electronic a muon passes through all tubes in the setup, a pulse is output from the Counter (TI170300). coincidence box. Placing steel plates between the tubes ensures that only very high-energy radiation is recorded. The third GM tube is used if you want Comprehensive instructions are included. additional suppression of random coincidences. The telescope can be set at different angles relative to vertical. Measurements To register coincidence between two or three GM tubes, a Coincidence Box (RA170505) is required. The output from the coincidence box goes to an Electronic Counter (TI170300), which is set to count with manual start and stop. Contents Muon observatory 25 x 3 mm thick steel absorber plates Also required: • Coincidence Box (RA170505) • Extra sensitive (large area) GM tubes x 3 (RA95592 x3) • Please note: identical detectors must be used • Electronic Counter (TI170300) Optional • Additional absorber plates (RA170502) - up to a total of 40 (max.) RA170500 £468.75 ea RA170505 £243.75 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 475

PHYSICS Atoms & Nuclei Teltron Tubes Deflection E-M Tube Universal Stand For investigating electron beams in electric and magnetic fields and determining specific charge e/m through compensation of magnetic deflection For mounting all demonstration tubes and the optical equivalent. The tube by electrostatic deflection. Also for estimating the speed of electrons. The holder consists of powder-coated cast aluminium with a clamping fork made integrated plate capacitor allows electron beams to be deflected by using the of heat resistant plastic and rotatable by 360°. The Helmholtz coils (not supplied). The beam path is visible on the fluorescent grid base plate contains two boreholes for mounting which is inclined 15 degrees in relation to the beam axis. Equipped with an demonstration Helmholtz coils. Including an anti-skid integrated focusing electrode system. support with three rubber feet. Weight: 2kg. Supplied without tube. Dimensions (L x W x H): 240 x 180 x 350mm. RA67550 £256.24 ea RA67580 £804.99 ea Maltese Cross Tube Teltron Dual Beam Tube For demonstrating the straight propagation of electron beams in field-free The dual beam tube can be used to determine the specific charge e/m from spaces by projecting the shadow of a Maltese cross on a fluorescent screen. the diameter of the path followed by electrons fired into the tube from a Also intended for observing the focusing of electron beams by magnetic fields perpendicularly mounted gun with a vertically aligned magnetic field and as an introduction to electron optics. The lower section of the maltese cross observation of the spiral path followed by electrons fired axially into a coaxial has a hole 3mm dia. which makes it possible to ascertain the orientation of the magnetic field. cross’s shadow under the influence of magnetic fields. The dual beam tube is a partly evacuated electron tube, filled with helium at low pressure and equipped with both axial and perpendicular electron guns. The electron beams are perpendicular to one another and a common deflector plate is provided for both guns. The electron beam source is an oxide cathode heated indirectly via a heating coil. The electron paths show up as a fine, slightly greenish beam due to impact excitation of the helium atoms. Requires a 300 V or 500 V DC power supply. • Filament voltage: max. 7.5 V AC/DC • Anode voltage: max. 100 V DC • Anode current: max. 30 mA • Deflector voltage: max. 50 V DC • Glass bulb: 130 mm dia. approx. • Total length: 260 mm approx. RA67570 £566.25 ea Electron Diffraction Tube RA130515 £887.49 ea The electron diffraction tube illustrates the wave nature of electrons by allowing Perrin Tube observation of interference caused by a beam of electrons passing through a polycrystalline graphite target on to a fluorescent screen. The wavelength of the For demonstrating the evidence of the particular nature of cathode rays, electrons can be calculated for various anode voltages from the radius of the establishment of negative sign of charge, the “electron” as an atomic particle, diffracted rings and the distance between the crystal layers in the graphite. concept of a “time-base”, operation of a cathode ray oscilloscope, simple Lissajous’ figures. The diode gun, a tungsten wire “hairpin” filament and a The electron diffraction tube is a highly evacuated tube with an electron gun cylindrical collimating anode, projects a narrow beam of cathode rays into consisting of a pure tungsten heater filament and a cylindrical anode all the evacuated experimental zone. This beam traverses the sphere to impinge contained in a clear glass bulb. The electrons emitted by the heated cathode on the luminescent screen in a spot about 4mm in diameter. The narrow are constrained to a narrow beam by an aperture and are then focussed by beam may be deflected in a vertical plane to enter the Faraday cage by using means of an electron-optical system. The resulting tight, monochromatic beam Helmholtz Coils. A further and horizontal deflection can be obtained using then passes through a micro-mesh nickel grating situated at the aperture of the an Auxiliary Coil, thereby constructing a simple cathode ray oscilloscope. All gun. Onto this grid, a thin layer of polycrystalline graphitised carbon has been connections are made on the Universal Stand. deposited by vaporisation. This layer affects the electrons in the beam much like a diffraction grating. The result of this diffraction is seen in the form of an image comprising two concentric rings that become visible on the fluorescent screen. A spot resulting from the un-deflected electron beam continues to be visible at the centre of the rings. Also requires an EHT power supply. Specifications: • Max. filament voltage: 6.3 V AC • Max. anode voltage: 5 kV • Anode current: approx. 0.1 mA at 4 kV RA130500 £887.49 ea RA75855 £637.49 ea 476 …inspiring tomorrow’s scientists through practical science.

Atoms & Nuclei PHYSICS Teltron Tubes continued Helmholtz Coils for Use with Fine Beam Tube Helmholtz Coils The Pair of Helmholtz coils is used for generating a homogeneous magnetic field and for the determination of the specific charge of the electron e/m in For generating a homogeneous magnetic field when mounted in the universal conjunction with the dual-beam tube. The coils can be switched in parallel or in stand in conjunction with the tube program for demonstration experiments. series. A spring clip on the top crossbar is used to mount the Hall sensor during 2 coils in a plastic casing on an insulated stand rod. measurements of the magnetic field. The maximum field strength generated by the coils (~ 4 mT) is approximately • Coil Dimensions (Dia.): 136 mm 750 times weaker than that produced by an MRI machine (~3 T), which are • Number of turns: 320 known to be safe for use by people with medical implants such as pacemakers. • DC resistance: approx 6.5Ω For use with RA130505. • Load rating: 1.5 A Requires a 0-20 V DC 5 A power supply. • Connections: two 4 mm jacks per coil • Stand Rod Dimensions (L x Dia.): 145 x 8 mm • Coil Dimensions (Dia.): 295mm • Coil spacing: 150 mm • Number of turns per coil: 124 • DC resistance: 1.2 ohms each • Maximum coil current: 5 A • Maximum coil voltage: 6 V • Maximum flux density at 5 A: 3.7 mT • Weight: 4.1 kg approx. RA67560 £372.50 pr Fine Beam Tube (Neon-Filled) with Connector RA130510 £487.50 ea Base Plug To Socket Leads The Fine Beam Tube is used for investigating the deflection of cathode rays in a uniform magnetic field produced by a pair of 300mm Helmholtz coils. A high quality extension lead consisting of highly flexible 384/0.05mm silicone In addition, it can also be used for quantitative determination of the specific cable terminated at one end by a standard 4mm plug and a 4mm line socket charge of an electron e/m. at the other. Located inside a glass bulb with a neon residual gas atmosphere is an electron gun, which consists of an indirectly heated oxide cathode, a Wehnelt cylinder and a perforated anode. The gas atoms are ionised along the path of the electrons and a narrow, well-defined, luminescent beam is produced. Incorporated measurement marks facilitate a parallax-free determination of the diameter of the circular path of the beam deflected in the magnetic field. The Fine Beam Tube is mounted on a base with coloured connectors. In order to protect the tube, a protective circuit is built into the base, which shuts off any voltage in excess of the base’s pre-set cut-off voltage. The protective circuit prevents excessive voltages from damaging the heater filament and ensures a “smooth” switch-on response once the voltage is applied. Requires a 0-300 V DC power supply and 300 mm Helmholtz coils. • Filament voltage: 4 to 12 V DC • Filament current: 300 to 450 mA • Anode voltage: 200 to 300 V • Anode current: < 0.3 mA • Diameter of fine beam path: 20 to 120 mm • Division spacing: 20 mm • Tube diameter: 160 mm • Total height incl. base: 260 mm • Base plate: 115 x 115 x 35 mm • Weight: approx. 820 g EL130956 Colour £5.53 ea EL130957 £5.53 ea Red Black 4 mm socket to 2 mm plug Adapters These adaptors convert a 4mm straight plug to a 2mm banana plug. They have a nickel plated brass spring and are housed in ABS. • Current rating: 32 A • Voltage rating AC: 30 V • Connector type: Banana plug to straight socket • Contact material: Brass • Contact plating: Gold • Insulator material: ABS • Length: 44.9 mm RA130505 £1,010.00 ea EL170420 Colour £2.49 ea EL170422 £2.49 ea Red Black Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 477

PHYSICS Electrostatics Charge Nylon Line for Electrostatics Friction Rods 100€m reel of monofilament nylon line, suitable for use with stirrups, pith balls A etc. 4€lb breaking strain. B C Type Length Diameter EL18665 A Ebonite (pure) 300 mm 12 mm £3.00 ea EL18666 12 mm £2.24 ea EL18667 B Glass 300 mm 12 mm £4.28 ea EL130470 15 mm £1.86 ea C Perspex 300 mm Nylon Rod 250 mm Dusting Cloth EL140195 £2.64 ea Yellow cotton, closed texture. Size: 500 x Pith Ball Support 400 mm. This support is supplied with a hook for conveniently holding a pair of pith balls connected by a string. Manufactured of nickel-plated brass with a plastic support base. Pith balls (EL150852) sold separately. Dimensions€(W€x€L€x€H):€100€x€70€x€220€mm. CL04240 Quantity £6.19 pk 5 Silk Cloth A silk cloth ideal for electrostatic investigations. Dimensions (L x W): 300 x 300mm. EL81495 £4.99 ea EL150850 £28.24 ea Electrostatic Strips ELECTROSTATIC SERIES This pack of electrostatic strips allows students to study charge in different The Electrostatic Series is a guide to whether one material is likely to gain a materials for electrostatic experiments. The pack consists of 10 clear positive or negative charge when charged (rubbed) by another material in the polycarbonate strips, which tend to gain a positive charge when rubbed with series. If a material which is placed higher in the list is charged / rubbed by a a cotton duster and 10 white polystyrene strips, which tend to gain a negative material which is lower in the list, the higher one is likely to remain or become charge when rubbed. Suitable for use with our brass wire stirrups. positively charged (lose or not gain electrons) and the material lower in the list is likely to remain or become negatively charged (keep or gain electrons). ELECTROSTATIC SERIES ELECTROPOSITIVE (+) ACETATE (cellulose acetate) ACRYLIC (PERSPEX) POLYCARBONATE Quantity Tendency to lose electrons Tendency to gain electrons NYLON 10 EL71600 £31.29 pk GLASS £23.11 pk WOOL Stirrup Pack FUR / HAIR Pack of 10 brass wire stirrups for use SILK with electrostatic strips. Supplied with fine nylon line for suspending from COTTON retort clamp. EBONITE POLYTHENE Quantity ELECTRONEGATIVE (-) RUBBER 10 POLYSTYRENE EL71605 478 …inspiring tomorrow’s scientists through practical science.

Electrostatics PHYSICS Charge continued Gold Leaf Electroscope Pith Balls The ‘Malvern’ dual purpose gold leaf electroscope has a metal plate to which a single gold leaf may be attached and is supported by an insulating bush These expanded polystyrene balls are used for demonstration experiments with in a metal case with 4mm socket earthing terminal. A scale is provided for electrical charge. Dimensions (Dia.): 12mm. measuring the deflection of the leaf. BEST SELLER EL150852 Quantity £11.88 pk 10 Brass Rod With Insulated Handle For showing that metals can acquire a static charge. The insulated handle is required to avoid unintentional discharge. Dimensions (L x Dia.): 250 x 8mm. Shaft Dimensions (L x Dia.): 100 x 12mm. Insulated Shaft Dimensions (L x Dia.): 100 x 12mm. EL81480 Gold Leaf Electroscope ✓ £27.50 ea £12.44 pk EL150860 SPARES & ACCESSORIES £11.19 ea EL81482 Gold Leaf, pack of 6 Electroscope Frederiksen Electroscope Consisting of a metal case with ground glass front and rear windows An open design electroscope from Frederiksen which does not require gold containing a metal plate with an attached special metal leaf supported by an leaf, for demonstrating electrostatic charges. When the electroscope has a insulated bush. The case is provided with a 4mm earthing socket. An internal charge applied to it, the pointer turns, and indicates the magnitude of the transparent scale divided 0 to 90 x 10 degrees is provided for measuring the charge. The device features a 150 mm diameter protective ring, which can be deflection of the leaf. Interchangeable electrodes are provided, a 50mm disc grounded. Supplied with a 15 mm diameter charge collector with 4 mm plug. top plate and metal ball 25mm dia. to show that charge will be the same on both surfaces. Dimensions (L x W x H): 143 x 63 x 112mm. EL62420 £44.00 ea EC170100 £156.19 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 479

PHYSICS Electrostatics Charge continued UVC Lamp UVA Lamp & Holder A UVC lamp for lamp holder EC180120, suitable for experiments with the photoelectric effect. An ultraviolet lamp in a high-quality housing with an aperture. The unit This light is harmful, especially to eyesight. It is connects directly to the mains via an IEC lead, and the housing has an on/off recommended that bare skin is covered, UV protective switch, and a screw-thread to attached a mounting rod. goggles worn, and the time the light is switched on reduced to a minimum. The unit is supplied with a UVA emitting lamp. This light is not harmful to skin or eyesight. NEW A UVC lamp (EC180122) is available for photoelectric work. ••• 11 W lamp spectrum 350-400 nm emission 370 nm peak NEW EC180122 ✓ £62.44 ea EC180120 ✓ £124.94 ea Zinc Plate with 4mm Plug for Electroscope Zinc Plate For Photoelectric Effect This mounted zinc plate has been designed for use with the Frederiksen electroscope (but can also This Zinc Plate can simply be placed on top of an existing electroscope plate to be used with any electroscope with a 4 mm plug allow demonstration of the Photoelectric Effect using UV light. The plate must socket) for demonstrating the photoelectric effect. If be cleaned on both sides before use, to remove any oxide etc., using wire the electroscope is charged and the attached zinc wool or emery paper. The zinc plate needs to be negatively charged for the plate is illuminated with UV light from a source such experiment to work. This can be done by rubbing a Perspex (acrylic), acetate or as Mercury lamp, the electroscope will become polycarbonate rod (to charge it), then placing this close to the zinc plate on the discharged. electroscope - BUT WITHOUT TOUCHING IT ON THE PLATE. The plate should then be touched with a finger, the finger removed, followed by removal of the charged rod. The gold leaf should then deflect outwards, as it has become charged. The best UV light source to use is one with a quartz glass lamp envelope. Dimensions: 50 x 50mm. EC170110 £12.44 ea PHOTOELECTRIC EFFECT The work function of zinc is 4.3 eV, which requires light of wavelength no greater than 288 nm to cause photoelectric emission. EL150610 £4.13 ea Spectral Lamps Coulombmeter Kit Electrostatic Charge Indicator For charge detection and measurement. Useful for a wide range of This charge indicator allows for easy, rapid investigation of electrostatic effects. experimental applications including charging by induction, Faraday’s ice pails, When it is moved towards a charged object, one of the LEDs will light up - red Coulomb’s law and capacitance of an isolated sphere. The 3.5 digit liquid indicates that the object is positively charged, and green indicates a negative crystal display has 13mm high digits with a wide field of view unobscured by charge. When a polythene rod is rubbed using a piece of cloth, for example, trailing leads. The display also provides indication of polarity and low battery. the green LED comes on when it is brought near the polythene, and red LED The unit is exceptionally easy to read. Two colour coded 4mm sockets are when near to the cloth. This demonstrates how negative charge has been located on the sides for maximum convenience and anti-slip feet are fitted transferred from the cloth to the rod. Requires 1x PP3 9V battery (not included). to the base. Low operating current gives expected battery life in excess of 500 hours. Housed in a robust, ABS plastic case. Supplied with charge plate, battery and instructions. • Range: 0 to 1999nC • Resolution: 1nC • Overload: 10 x full scale • Accuracy: ±10% of full scale • Input Resistance: • 100GΩ Leakage Current: 1pA • (10pA max) Capacitance: 4.7mF BEST SELLER EL81490 ✓ £74.97 kit EL101540 £33.45 ea SPARES & ACCESSORIES £3.83 ea BA01970 PP3 Battery 480 …inspiring tomorrow’s scientists through practical science.

Electrostatics PHYSICS Spectral Lamps continued Electric Fields E-Field Apparatus Electrometer This apparatus allows visualisation of electric fields between various electrode Used as a picoammeter, this electrometer is useful for photoelectric effect configurations, in a similar way to how iron filings allow visualisation of experiments (e.g. determining Planck’s constant) and ionisation experiments magnetic fields. It is constructed from transparent acrylic, which allows it to be when used with the ionisation chamber RA150000. placed on an overhead projector for class demonstrations but can also be used As a nanocoulombmeter, it is possible to determine the capacitance of a on a white surface for use with visualisers or for direct observation by smaller parallel plate capacitor EL120700, and measure electrostatic induction in groups. In order to create electric fields large enough to influence the particles, Faraday’s Ice Pail experiment. a high voltage, low current 2-5kV EHT power supply is required. Apparatus The instrument’s design almost completely eliminates leakage currents, for includes electrodes, clear acrylic increased accuracy. Two 4 mm sockets provide output for connection to a data base with 4mm sockets to clamp logger or meter. electrodes and connect power supply, It uses a 9 volt battery, which gives approximately 25 hours use. petri dishes and instructions. Also requires liquid paraffin (PA4452 or • Current ranges: ±5, ±50, ±500 pA PA4454 and semolina (not supplied). • Charge ranges: ±5, ±50, ±500 nC Base dimensions (L x W x H): 150 x • Output : 4 mm sockets ± 0.5 V FSD 150 x 65 mm. EL71550 £82.25 ea Parallel Plate Capacitor Kit This Parallel Plate Capacitor demonstrates the working of a capacitor; a device which allows the storage of electrical energy in the electric field created between a pair of conductors on which electric charges of equal magnitude, but opposite polarity, have been placed. The apparatus will show the dependence on capacity to the distance between the plates and the nature of the medium between them. Dielectric materials can be placed between the plates for further investigation. EL150840 £368.75 ea Faraday’s Ice Pail for Electrometer Faraday’s Ice Pail, for demonstrating electrostatic induction. Designed for use with electrometer EL150840 or an electroscope with 4mm socket. Comes with 4 mm plug. Diameter: 68 mm. EL120700 £83.68 kit EC170200 £17.44 ea Wimshurst Machines Ball on Insulated Rod for Electrometer Wimshurst Machine A 38 mm metal ball mounted on a 130 mm plastic insulated handle, used to The device generates high voltages for electrostatic experiments. Voltages of transfer an electrical charge e.g. to the Faraday’s ice pail when connected to up to 160 kV and sparks 80mm long are possible under ideal conditions. an electrometer. A charge is generated by revolving the two plates in opposite directions. The charge is then collected and stored in the Leydon jars and discharges by the adjustable electrodes.The Leydon jars can be isolated from the system. Plate Dimensions (Dia.): 300mm. EC170300 £13.69 ea EL40200 £159.95 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 481

PHYSICS Electrostatics Van De Graaff Generators Neon Discharge Tube for Electrostatics Van De Graaff Accessories Kit A large neon-filled gas discharge tube for demonstrating electric charge and polarity. The tube has a clear separation between the two electrodes and an For demonstrating and investigating the nature and behaviour of static orange glow indicates negative polarity. electrical charge. Includes; Brush of hair, Dancing balls, Oscillating sphere, Spiked arm wheel, Neon tester, Plastic comb. • Ignition voltage: 90 V • Length : 100 mm • Diameter : 13 mm EL85110 £68.75 kit Discharge Sphere EF170100 £16.69 ea For using to discharge the Van de Graaff with sparks up to 100mm. The Insulated Stool polished stainless steel sphere is mounted on a stainless steel rod. The base of the rod has a 4mm hole for connection to the earth socket on the Van de For use in experiments with static electricity. A thick, single sheet of clear Graaff. Sphere Dimensions (Dia.): 100mm. Rod Dimensions (L): 410mm. Perspex with two line bends to give it height. 30 x 30 cm platform size. 8 cm in height. FU91980 £62.44 ea EL62565 £54.94 ea Nightlight Burners Electric Whirl Foil Cases For demonstrating the effect of electrical discharge from points. The wheel For containment, gentle heating or weighing of samples, or for a dramatic rotates freely on a pivot point mounted on a short stand with a 4mm plug. demonstration of like-charge repulsion with a Van de Graaff Generator. The smaller cases can be used with the Night Light Stands (BU80550). EL62570 £16.88 ea BU108020 Size Quantity £6.18 pk BU170025 £7.44 pk 482 Small 40 Large 50 …inspiring tomorrow’s scientists through practical science.

Electrostatics PHYSICS Van De Graaff Generators continued Van De Graaff Generator, Premium Van De Graaff Generator, Hand-Driven A top quality Van de Graaff featuring motor or hand drive split dome to show how charge is collected in the dome. The generator uses one A hand driven Van de Graaff generator, which is a very effective unit for nylon and one Teflon roller to create a double charging effect and sparks introducing electrostatics. The length of the sparks generated is wholly up to 10€cm. The 22€cm conductor sphere features a 4€mm socket dependent upon the speed at which the user turns the handle but sparks of on the top to accept accessories with a 4€mm plug. For 220/240€V. around 20-30mm are comfortably achievable. Dimensions (H x Dome Dia.): Dimensions€(H€x€W€x€D):€560€x€220€x€220€mm. 400 x 200mm. Please note that Discharge Sphere is supplied separately. BEST SELLER EL101544 £119.76 ea SPARES & ACCESSORIES £15.96 ea EL130460 Spare main charge belt £3.18 ea EL130465 Spare hand drive belt Van De Graaff Generator The Generator consists of a dome supported by a pillar and a rubber belt driven by an electric motor concealed in the metal base. Static electrical charge is produced by friction between this band and two rollers. The charge is removed from the belt by a metal gauze and stored in the dome. The motor is powered using a mains supply (230 V). The base is fitted with a 4 mm diameter socket which can be used either for supporting a conducting sphere (fitted with a cranked rod support) or for a wire connection to a separate conducting sphere. A cover is provided to keep the Van de Graaff free from dust when not in use. • Diameter of Generator Dome: 220 mm • Total Height: 500 mm • Base (max) Dimensions: 218 x 182 x 93 mm • Operating Voltage: 220 to 240V AC (with 5A cartridge fuse) • Dome Capacitance: (approx) 15 pF • Maximum (intermittent) current: (approx) 6 µA • Maximum Spark Length: (approx) 50 mm • Diameter of Conducting Spheres: 100 mm EL62550 ✓ £512.50 ea £24.94 ea SPARES & ACCESSORIES £4.38 ea EL62560 EL62562 Charge collecting belt Drive belt The generator must be OUR EXPERTS SAY... thoroughly clean and dry for best effect. EL85100 £390.63 ea For a cleaning guide, see £13.19 ea SPARES & ACCESSORIES timstar.co/EL62550-cleaning EL85106 Spare Belt Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 483

PHYSICS Electromagnetism Electromagnetic Induction Demonstration Dynamo, DC Faraday’s Law This demonstration model facilitates the understanding of how a dynamo works, thanks to the open and exposed design. A mounted armature, This Faraday’s Law apparatus consists of an acrylic assembly with a mounted comprising two coils of copper wire, is rotated about a horizontal axis by 100 turn coil and 4mm sockets. This assembly fits onto the acrylic tube turning the hand cranked drive wheel within a magnetic field, created by the supplied and can be moved up or down the tube, depending on height of drop permanent U-magnet supplied with the unit. Mounted on a plastic base with required. When a small cylindrical magnet is dropped down the tube, an EMF LED and two 4 mm sockets for connection to measuring instruments. Drive is generated in the coil as it passes through. Wheel Dimemsions (Dia.): 140 mm. Base Dimensions (W x L): 150 x 200 mm. A PC oscilloscope or standard oscilloscope is then used to measure the amplitude. The height of magnet drop can be varied to show how speed affects the amplitude. Contents include mounted coil, long acrylic tube and magnet. EN101558 £54.79 ea SPARES & ACCESSORIES £2.64 ea EN151558 Spare belt EL71560 £53.88 ea Demonstration Dynamo AC/DC A hand driven pulley coupled to the smaller dynamo pulley by a rubber belt to give a step-up ratio, to generate both AC and DC. Electrical output is via 2 pairs of 4 mm sockets (AC and DC) and two LEDs. Faraday’s Torch The shaking of this device causes the magnetic induction of the coil and produces sufficient electricity to drive the LED bulb - perfect for demonstrating Faraday’s Law. Dimensions (L): 170mm. HE72390 £12.85 ea HE53710 £75.30 ea SPARES & ACCESSORIES £2.13 ea EL150582 Spare belt Dynamo Torches Motor/Generator Unit Hand powered torch. Electricity is generated by squeezing the lever to power This unit can be used for a variety of purposes to illustrate energy transfers: the dynamo. it can be used to lift a mass or stretch a bungee cord, and to generate an electrical current when the mass falls again or the bungee cord is released. It can also be turned by hand to generate a current. The motor/generator (6-9 V) is mounted on a robust metal base, and the gearing of the unit and the sizes of the pulleys have been chosen to enable a variety of qualitative and quantitative experiments to be undertaken. EL150530 Quantity £24.98 pk EN101562 £62.44 ea 2 484 …inspiring tomorrow’s scientists through practical science.

Electromagnetism PHYSICS Electromagnetic Induction continued Dynamo Motor/Dynamo A cycle dynamo with a trouble free drive system supported on an acrylic base. The dynamo output is available at two 4mm sockets for connection to other This apparatus is a great way to show how electrical energy is lost when equipment but a torch bulb is provided to directly demonstrate the production converted to mechanical energy and back again - from a motor to a generator. of electricity and light from movement. Max output 3W at 6V a.c. Dimensions Two identical motors, mounted on a moulded base, have their shafts joined by (L x W x H): 200 x 100 x 110mm. means of a flexible coupling and both are connected to 4 mm sockets mounted on the base. By applying 1.5 - 4.5 V DC to one motor, electrical energy is converted into mechanical energy and then back to electrical energy by the other motor, which acts as a dynamo. The voltages can be compared by using bulbs, meters or multimeters connected to each of the pairs of sockets. EN130510 £24.98 ea Universal Motor Generator HE72380 £69.59 ea A 0-12 V DC motor that can also act as a generator. The shaft has a locking Lenz’S Law Demonstration Of Magnetic Braking nut for clamping stroboscope discs, flywheels etc. It also has a pulley wheel to drive or be driven by a rubber band. Speed 0-4800 rpm. Demonstration of magnetic braking. When a strong magnet rolls down the aluminium U-profile, the changing magnetic field will induce an eddy current in the U-profile. According to Lenz’s law, this current will generate a new magnetic field opposing the changes in the original field. The motion will be slowed down dramatically. Delivered with two neodymium magnets and two non-magnetic dummies of stainless steel. HE53780 £37.44 ea DC Generator/Motor Model Kit MA154000 £47.44 ea This generator/motor model kit, from Frederiksen, demonstrates the basics Eddy Current/Lenz’s Law Kit of a DC or single phase AC generator, and also functions as a DC motor. The model includes all the individual parts combined into one set, although This kit consists of two tubes (one copper, one plastic) and two discs (a replacement parts are available separately. This high quality model provides supermagnet and an aluminium disc of a similar size). When the supermagnet an open design, allowing students to easily see and understand the workings is dropped down the copper tube, it falls much more slowly than might be of a motor and a generator, as well as allowing for further investigations and expected. The other tube/disc combinations do not show this effect, since eddy experimentation. Requires self-assembly. currents are only produced using the copper tube and the supermagnet. Tube Dimensions (L): 250mm. The kit includes the following parts: Coil holder with commutator; Coil with 400 turns (windings); Laminated iron core; Contact springs x2; Profile track; Sliding saddles x4; Magnet supports x2; AlNiCo bar magnets; Manual drive pulley; Drive belts set. For further experimentation, coils with different numbers of turns are available separately (see below). MA104000 £16.70 kit Eddy Current Kit For demonstrating Lenz’s Law. Containing a copper tube, two identical test plugs - one steel and one neodymium magnet. Complete with instructions. EN140100 £374.94 kit MA10190 £14.76 kit SPARES & ACCESSORIES £24.94 ea EN140105 Coil, 200 turns £24.94 ea EN140110 Coil, 400 turns £24.94 ea EN140115 Coil, 800 turns £24.94 ea EN140120 Coil, 1600 turns Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 485

PHYSICS Electromagnetism A Westminster Electromagnetic Kit Westminster Motor Kit Westminster Electromagnetic Kit Westminster Motor Kit A comprehensive kit for teaching up to 8 students the various aspects of Kit of parts to build six model motors as in the ‘Westminster’ electromagnet electromagnetism. Containing: Alloy magnets, ceramic magnets, steel kit. The Motor Construction Kit enables pupils to build their own motors magnets, yokes, plotting compasses, hardboard formers, iron filings, double from scratch. By having to construct motors in this way pupils gain a better C-cores, clips, rings and split rings, support bases, armatures, axle rods, understanding of the theory behind electric motors. split pins, rivets, rubber tubing, formers, reels, cellulose tape, copper wire, pasteboard, postcards, cotton, resistors, bulbs, lampholders, clamps, blocks ••C••••••••o1661261263n2420trrsamse0eeuhrrs‘nimMeemipapltvdllsfplesamait:0tostsgtSs.tuprn6teeturiamelneblbodlssamiutynsaorgepP’k,sVeem2Cs.a5gtminnmentesbdocroepper wire and full instructions. MA91525 A Quantity £357.19 kit £37.54 pk SPARES & ACCESSORIES 10 £27.33 pr Type 2 £4.36 ea each £26.08 ea EL130310 Mild steel Yokes 2 (+ 1 clip) £7.54 pk EL130315 C Core 10 £27.13 pk EL130320 C Core Clip 5 £11.93 pk EL130325 C Core & Clip 5 £11.09 pk EL130330 Shafts (axels) 50 £3.73 pk EL130335 Armatures 20 £1.51 ea EL130340 Bases 1 EL130345 Rivets EL130350 Split pins EL130355 Silicone rubber tubing, 500 mm Westminster Power Supply Ideal for electromagnetic investigations. The unit will deliver up to 12A at 1V AC or DC through colour coded terminal posts. MA18796 £99.94 ea MA18794 £77.65 kit 486 …inspiring tomorrow’s scientists through practical science.

Electromagnetism PHYSICS C-Core & Coils U-Shaped Electromagnet C-Core Coils Set Designed for student experiments in electromagnetism, this U-Shaped Electromagnet encourages students to discover and learn the relationship A range of sturdy, mounted coils, designed for use with laminated C cores between electricity and magnetism. and clips. The coils have different numbers of turns of copper wire, allowing Requires a standard laboratory power students to investigate the relationship between voltage and number of turns, supply, maximum voltage 12V DC. showing how transformers work etc. They can also be used to demonstrate Weight: 0.3kg. Dimensions (W x L x D): electromagnetic induction (Faraday’s law). Coils come complete with 4mm 100 x 150 x 50mm. sockets and are available individually or as a set of 5 coils: 50 + 100 turns; 200 + 300 turns; 300 + 350 turns; 400 + 500 turns; 550 + 600 turns. EL120405 £13.86 ea EL71510 Coil 50 + 100 Turns £46.99 ea Hercules’ Electromagnet EL71512 Coil 200 + 250 £62.47 ea EL71518 Coil 550 + 600 £68.72 ea An amazing demonstration of how EL71520 Set of 5 Coils £256.88 set powerful magnetism can be! Powered by £27.33 pr just one 9V PP3 battery this apparently small magnet has the incredible lifting £4.36 ea power of approx. 150kg. When switched £26.08 ea on an iron plate locks itself solidly to the bottom of the electromagnetic core. Turning the switch off will release the load or hold it in the air, as required. Karabiners situated at the top and bottom of the device make it easy to clip into position. Battery and instructions are supplied. SPARES & ACCESSORIES Quantity EL91514 £55.90 ea Type SPARES & ACCESSORIES £3.83 ea 2 BA01970 PP3 Battery EL130315 C Core each EL130320 C Core Clip 2 (+ 1 clip) EL130325 C Core & Clip Electromagnets Variable Electromagnet Investigation Soft Iron Rod This apparatus is used to study the effect of number of coils on the strength of an electromagnet. The effect of current on strength of the electromagnet Useful for cores of electromagnets as soft iron loses its magnetism when the can also be studied. The electromagnet coil has 4mm sockets and tappings current in the coil is switched off, whereas steel retains some magnetism after at 100, 200, 300, 400, the current is switched off. Dimensions (L x Dia.): 200 x 12mm. 500 and 600 turns. A hook on the underside allows paper clips to be attached to indicate the strength of the electromagnet for each variable. A low voltage laboratory power supply is also required. EL71555 £56.46 kit MA10194 £4.30 ea Soft Iron Bar, Square Section Magnetising and Demagnetising Coil A square section soft iron bar, for use in magnetic and electromagnetic For magnetising and demagnetising ordinary magnets, iron bars etc. experiments. Dimensions: 10 x 10 x 100 mm. Consisting of a 250 mm long solenoid wound with insulated copper wire mounted on a base with switch and 4 mm terminals. Operating voltage 12 V AC or DC at 6 A. Magnetising by AC or DC. Demagnetising by AC. MA170400 £4.75 ea MA10198 £51.64 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 487

PHYSICS Electromagnetism Electromagnets continued Electromagnet Kit Relay Demonstration To demonstrate the relationship between magnetism and electricity. Soft iron U-shaped core and keeper with hook. Dimensions (H x Dia.): 110 x 9mm. The Relay Demonstration Unit allows the investigation and study of how a relay functions, in a clear and practical manner. A useful property of this unit is that the circuit powering the coil is easily seen to be completely separate from the circuit switched on by the relay. This is one of the reasons relays are used where a safe low voltage circuit can be used to control a high voltage circuit. When a current flows through the coil an electro-magnetic field is produced. This field attracts the iron armature whose end makes the contact, completing the circuit and illuminating the lamp. When the current is switched off, the contact will open again, switching the circuit off. Specifications: • Control input voltage: 2 V DC • Switched supply voltage: 12 V Max MA10148 £13.33 kit Floating Globe The globe is suspended from an electromagnet. This makes the friction very low and the earth will rotate at a constant speed for many hours after being spun around. AC adapter included. Dimensions (Dia.): 200mm. EL91505 £32.21 ea Electric Bell Demonstration All the components of an electric bell are mounted on a large panel. All wiring is visible and parts are large in size. Operates on 3-4 volts DC MA150700 £56.25 ea EL91510 £32.11 ea Forces on Moving Charges Electric Bell, Visual Force on a Conductor Apparatus This open design electric bell is mounted A version of a traditional piece of equipment for demonstrating the effect of on a base plate, with two 4 mm sockets for a current flowing through a conductor in the presence of a magnetic field. power input from a standard DC laboratory Connection is made via the 4mm sockets attached to the side rails. When a power supply (or batteries). The design current of up to 8A flows, the crossbar rolls one way or the other under the means that the contacts and coils etc. can action of the electro-magnetic force. With clearly labelled poles to the magnet it be clearly seen, to show the workings of an is easy to demonstrate Fleming’s Left Hand Rule. electric bell. EL130300 £20.66 ea EL101515 £78.22 ea 488 …inspiring tomorrow’s scientists through practical science.

Electromagnetism PHYSICS Forces on Moving Charges continued Motor Kit Current Balance (BIL Coil) This self assembly motor kit is very robust and clearly demonstrates the constituent parts of a DC motor. This current balance apparatus (BIL coil) consists of a printed circuit board coil mounted on a support handle. The board has 2 coils – one with 5 turns and one with 10 turns, rated at 2A. The apparatus can be used to measure the force on a current carrying conductor in a magnetic field. A permanent magnet should be placed on the pan of a digital balance (a yoke with 2 ceramic magnets will work) and the BIL coil mounted in a vertical plane between the magnets. When connected to a low voltage power supply and ammeter, the balance will be deflected and the new reading can be taken. The force on a current carrying conductor and field strength can then be calculated. EL81440 £31.61 kit £5.95 ea SPARES & ACCESSORIES £4.86 pk EL81441 EL81442 Spare Magnet Spare Brushes, pack of 20 EL71505 £14.29 ea Demonstration Electric Motor Demonstration Motor A model of the simplest form of DC electric motor, having 2-pole armature wound with enamelled copper wire, and a permanent magnetic field provided This demonstration motor comes ready assembled, with an open construction by a removable bar magnet. The construction of the model is completely which clearly shows the design working parts of a simple motor. The motor is open and all components are readily observable. A disc-type commutator is mounted on a robust wooden base with acrylic end plates with 4mm sockets incorporated and external connection and comes complete with ceramic magnets and yoke. Requires a 1 -3 Volt DC to the phosphorous bronze bushes is by laboratory power supply (not included). Overall Dimensions (L x W x H): 125 x means of a pair of 4mm sockets. The 75 x 60 mm. motor operates on 6-8 V DC. HE53715 £49.10 ea EL71530 £68.75 ea FLEMING’S LEFT HAND RULE Fleming / Pohl Swing (Oersted’s Law Apparatus) For demonstration of the force on a current carrying wire in a magnetic field. Dimensions (H x W x D): 270 x 100 x 160mm MA150720 £99.94 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 489

PHYSICS Magnetism Magnetic Fields Iron Filings in Sprinkler Pot Circular Coil Supplied in pepper drum. This apparatus offers a clear and easy way to observe magnetic fields generated by a constant electrical current. Iron filings can be scattered on the clear surface which passes through the coil and when a current then flows around the coil, the magnetic lines of a force will be shown by the alignment of the filings. The apparatus can also be used in conjunction with a magnetic field sensor and/or datalogger. Requires a high current laboratory power supply (8-10A) for best effect. Weight: 1.2kg. Dimensions (L x W x H): 300 x 200 x 250mm. MA10193 Quantity £2.85 ea 250 g Plotting Compass, Economy Dial marked with principle points of the compass. EL120400 £55.10 ea Helmholtz Coils, with support CO04600 Diameter Quantity £3.15 pk 16 mm 10 A pair of preformed coils, each with 400 turns of copper wire, wound onto a former of approx. 150 mm diameter. Plotting Compass Each coil is mounted on a support rod, which fits onto the sliders of the track With two clear glass faces. system supplied. This enables the distance between the coils to be varied whilst maintaining alignment along a common axis, for measurements and study of CO04605 Diameter Quantity £5.21 pk magnetic fields. 19 mm 10 Electrical connection is via 4 mm sockets. Please note: the current should not exceed 1A, to prevent overheating or damage. Direction of current is marked on each coil. • 150 mm diameter • 400 turns • Max. current 1A MF170000 £72.31 pr Magnetic Field Viewing Film Demo OHP Field Patterns This amazing flexible sheet ‘visualizes’ the direction of magnetic field lines. The sheet is coated with translucent microspheres (hollow capsules) containing very Clear base units for bench or OHP use, to demonstrate electromagnetic fields small magnetic nickel flakes suspended in an oil. The flakes inside the spheres around conductors. Available as three different models. align along the field lines when a magnetic field is present. The alignment of the flakes, and thereby the magnetic field direction, is visible because of Each mounted on a base measuring L150€x€W150€x€H45€mm. reflected light from the flakes. Useful for quality control, product demonstration, reverse engineering, and educational purposes. Two types and sizes are available: laminated and non-laminated ‘raw’ film. The laminated film is ideal for student use as it is more durable and less easy to damage. The non-laminated film is great for demonstration purposes as it can be cut to any size or shape as required, is highly flexible and can easily be wrapped around objects. A good example is to wrap it around a copper tube to ‘view’ the progress of a neodymium magnet as it slowly descends through the tube. The film is also useful for viewing complex magnetic pole geometry close to the magnetic poles, although it does require fairly strong magnetic fields. B A C EL91516 Type £13.93 ea MA150400 Type Dimensions £46.93 ea EL91518 £7.41 ea MA150402 £10.21 ea EL91520 A Solenoid £8.19 ea Non-Laminated 30 x 30 cm B Vertical Wire Laminated 95 x 95 mm C Twin Coils 490 …inspiring tomorrow’s scientists through practical science.

Magnetism PHYSICS Magnetic Fields continued Magnetic Field Plates Set Magnetic Field Tube A versatile and impressive tool for displaying field patterns on an OHP and simulating the magnetising of a bar. When four plates are stacked together, A double wall tube with iron filings encased between the two layers to show they model a metal bar that can be magnetised by stroking with a bar magnet a 3-dimensional view of the magnetic field around the magnet. Dimensions and demagnetised by shaking. 98 magnetic pins in each plate. (L x Dia.): 130 x 90mm. MA10185 £19.05 ea MA55050 Quantity £49.94 set 4 Iron Filings in Bubble Magnetic Pole Pattern Suitable for many simple magnetic field plotting experiments. Dimensions Iron filings in a clear liquid for demonstrating magnetic fields. When magnets (Dia. x D): 80 x 12mm. are placed near the box, the shape of the magnetic field is clearly visible. Supplied complete with magnets and instruction book. Dimensions (L x W x D): 225 x 130 x 15mm. MA10187 £40.05 ea MA10192 £1.65 ea Superconductor, Meissner Effect Magnetic Field Box Kit Using a high temperature superconductor (HTSC), this kit demonstrates an intriguing magnetic property of superconductors, known as the Meissner effect. For demonstration of two and three dimensional magnetic field lines. The kit includes a magnetic field box, a magnetic field plate and three magnets (2 bar The kit demonstrates the levitation of a small rare earth magnet above the high magnets and a horse shoe shaped magnet). The magnetic field box as well as temperature superconductor, caused by the partial expulsion of the magnetic the plate contains iron file flakes suspended in viscous liquid. In the middle of flux from the HTSC sample. the box is placed a magnet forcing the iron file flakes to turn to display the field lines. Likewise it is possible to place a magnet on the plate to visualize the field Liquid nitrogen (not supplied) is required as a coolant, to bring the lines. Box Dimensions: 76 x 76 x 76mm. Plate Dimensions (W x L x D): 91 x superconductor below its critical temperature. 157 x 9mm. When the superconductor is cooled, under a weak magnetic field, to a temperature below its critical temperature, it becomes superconducting i.e. loses its electrical resistance. The magnetic field becomes expelled from the superconductor, causing it to become perfectly diamagnetic. At this stage, the sample is said to be in the Meissner state. Please note: liquid nitrogen is required, but not supplied Kit Includes: • Insulated Styrofoam holder • Superconducting HTSC disk • NdFeB rare earth magnet • Tweezers • Instructions, including advice for handling liquid nitrogen MA84015 £41.19 kit MF170300 £99.94 ea Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 491

PHYSICS Magnetism Magnetic Fields continued Magnetic Wand Tesla Meter, Digital This easy to handle wand allows for more practical, safer use of rare earth (neodymium) magnets. It is 130mm long and has a 12.5 x 5.5mm Neodymium This meter uses a highly sensitive Hall effect probe which allows users to magnet held securely at one end. There is also a 4.5mm hole at the other end investigate the size and direction of magnetic fields making it ideal for to allow the wand to be hung from a cord or to allow for experimentation using investigating the fields around current carrying wires. The probe can even weights, etc. detect the Earth’s magnetic field. The unit displays the field strength in millitesla across two separate ranges (0-20 mT and 0-200 mT). A zero adjust allows for MA150404 £3.88 ea compensation of background fields. • Range: 0-20 mT & 0-200 mT • Resolution: 0.01 mT on the 20 mT range • Power Input: 230 V AC, 50Hz • Weight: 3.4 kg Magnetic Globe & Magnaprobe Set This two piece set comprises a rubberised ball representing the Earth and a hand held magnet called a Magnetic Field Finder. A really magical way to see and understand the Earth’s 3 dimensional Magnetic Field Pattern. Comes complete with a full explanation for the teacher and pupil. MA104004 £218.75 ea Tesla Meter, Frederiksen A simple, user-friendly instrument designed to measure strong magnetic fields, e.g. from Alnico magnets, coils or electromagnetic experiments. This apparatus comprises a Hall Effect probe sensitive to magnetic fields, a MA93960 £26.99 set mounting rod, and a meter unit for displaying data. The instrument has an auto-range display, automatically changing between the two ranges. The probe is mounted in a sturdy housing, with a threaded nut for mounting Search Coil with the enclosed rod, and has a DIN connector, ensuring that the probe and the instrument can be interchanged without calibration and can be used with Comprises a 3300 turn coil mounted on a wand, with flying leads terminating other Frederiksen Teslameters. in 4 mm plugs. An alternating magnetic field passing axially through the coil will induce an e.m.f., which can be observed on an oscilloscope or AC The instrument is powered by means of a 6-12V DC power adapter. millivoltmeter. Designed and manufactured in the UK. ••••• Range: 0.01-2 T x1 mT mm BEST Range : 1-200 mT x0.1 mT x D) Precision 5% SELLER Dimensions: 158 x 108 x 56 Probe: 10 x 8 x 2 mm (L x W MF170100 ✓ £59.94 ea £6.56 ea SPARES & ACCESSORIES EL18516 BNC Plug to 4mm sockets MF170700 £324.94 ea AC Magnetic Field Coil Magnaprobe Mark II Comprising a 10 turn coil of diameter approximately 15 cm, mounted on a base with 4 mm connecting sockets. When AC is passed through the coil, an A free moving magnet mounted in a gimble to show the true shape of alternating magnetic field is induced, which can be detected with a search coil. magnetic fields far better than iron filings or plotting compasses. Requires a power supply which can deliver a high current at low voltage, such as a Westminster Power Supply MA18796. The current must not be allowed to exceed 6 A. Designed by Timstar for AQA A-level physics required activity number 11. BEST SELLER MA10188 £11.85 ea MF170200 Quantity ✓ £41.19 ea 10 £4.18 pk 492 SPARES & ACCESSORIES Type DR06321 Protractor, Semicircular …inspiring tomorrow’s scientists through practical science.

Magnetism ● Magnets PHYSICS Magnetic Fields continued Multitap Transformer Westminster Power Supply Outputs tapped at 0 V, 2 V, 3 V, 8 V and 12 V AC, with a 4 mm socket for each tapping. Ideal for circuits where a high current is required at low voltage. Ideal for electromagnetic investigations. The unit will deliver up to 12A at 1V Housed in a robust metal case with durable powder coated finish. AC or DC through colour coded terminal posts. • Output: 0 V, 2 V, 3 V, 8 V or 12 V AC • Current: 6 A continuous (8 A for up to 1 hour) • Dimensions: 179 x 190 x 85 mm • Weight: 3.3 kg MA18796 £99.94 ea EL170190 £137.50 ea Magnets Bar Magnets, ‘Alnico’ Bar Magnets In pairs with keepers. Bar Magnets Set £19.74 pk MA10130 Dimensions ✓ £11.19 pr A set of 20 painted magnets for general MA10135 £16.19 pr purpose use in magnetism experiments. 50 x 16 x 10 mm (L xW x D) Each magnet is red/blue colour coded to 75 x 16 x 10 mm (L xW x D) help identify the north and south poles and the set comes supplied in a snap top case. ’Magnadur’ Magnets Individual magnet size: 14 x 10 x 50 mm. Ceramic, suitable for the Westminster Electromagnetic Kit. MA170300 Bar Magnets Pack A pack of painted bar magnets, with red and blue poles, stamped with ‘N’ & ‘S’. Supplied as a pack of 20 magnets. Individual magnet size: 9 x 9 x 40 mm. MA170310 £9.88 pk MA10120 Dimensions Quantity £3.73 pk 50 x 19 x 6 mm (L x W x D) 10 Bar Magnets Bar Magnets, Plastic Coated Chrome steel. Rectangular in shape. In pairs with keepers. Ideal for Ceramic. demonstrating magnetic fields. Not suitable for attraction/repulsion experiments. MA10105 Dimensions ✓ £5.35 pr MA10125 Dimensions £5.16 pr MA10110 £8.15 pr 80 x 22 x 10 mm (L x W x D) 75 x 13 x 6 mm (L x W x D) 100 x 15 x 6 mm (L x W x D) Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 493

PHYSICS Magnets Cylindrical Magnets Major Magnet, ‘Alcomax’ Cylindrical Magnets, ‘Eclipse’ One of the most powerful permanent magnets ever produced. Distance Alcomax. Supplied in pairs. between poles 27mm. Dimensions (L x H x W): 110 x 103 x 50mm. MA10147 £162.44 ea MA10140 Length Diameter £3.10 pr Magnet Kits 25 mm 8 mm Magnet Kit Horseshoe Magnets A basic range of magnets and accessories supplied in a compartmented Horseshoe Magnets, Plastic storage case. Consisting of: Horseshoe magnet 100mm high, 1 pair plastic cased bar A powerful horseshoe magnet in a plastic case. magnets 80mm, 4 pieces magnetic rubber sheet 50 x 50mm, 5 Ferrite rings 24mm dia, 5 Ferrite squares 19 x 19 x 5mm, 1 each Alnico button magnets 12, 19, 24mm dia. 2 plotting compasses clear both sides 19mm dia. 2 plotting compasses 16mm dia. 1 ‘Alnico’ cast horseshoe 25mm, 2 chrome rods 100mm, lodestone walnut size. MA10149 Type Dimensions £3.18 ea MA10168 £46.39 kit MA30506 £5.41 ea Large 110 x 110 x 30 mm (L x W x D) Giant 210 x 175 x 25 mm (L x W x D) Horseshoe Magnet, ‘Alnico’ Super Magnets Pack Supplied with keeper. An assortment of ceramic magnets, ferrite discs, rings, and squares. MA10145 Dimensions £4.35 ea MA10167 Quantity £26.18 pk 25 x 22 x 8 mm (L x W x D) 300 494 …inspiring tomorrow’s scientists through practical science.

Magnets PHYSICS Neodymium Magnets Magnetic Putty Neodymium Magnets Magnetic Putty Powerful disc magnets with the poles on the flat surfaces. Please Note: These It shatters, bounces, stretches and eats magnets - silly putty with a difference! magnets are brittle and fragments can fly off if magnets are allowed to come This magnetic putty is similar to normal silly putty but it is also magnetic. It together rapidly, potentially causing harm or eye damage. Careful handling is reacts as other silly putty does i.e. as you knead it warms up and becomes also required to prevent skin from becoming trapped between two magnets. softer, it can be bounced, stretched and shaped or broken when stretched suddenly from cold. But, if you put a strong magnet, such as a neodymium, A BEST D close to it, the putty will be attracted to the magnet and will gradually engulf it! A fun way of demonstrating magnetism in the classroom. B SELLER C Also includes a small neodymium cube magnet. Not suitable for young children. Diameter Depth Quantity MA94016 A 6 mm 3 mm 5 £4.94 pk MA160110 £7.44 pk MA30500 6 mm 3 mm 10 ✓ £0.94 ea MA160100 £8.44 pk MA30502 B 10 mm 8 mm 1 £3.13 ea MA160105 £13.13 pk MA160500 10 mm 8 mm 10 £8.19 pk MA160505 £6.76 pk MA160510 C 20 mm 10 mm 1 £7.69 pk 20 mm 10 mm 5 10 mm 4 mm 10 15 mm 4 mm 4 D 3, 4 & 10 mm 6, 10 & 20 mm3 Super Magnets Housed in tough colour coded outer mouldings, the design allows children to safely experience the force of neodymium. MA130505 £7.98 ea Magnetic Marbles Magnetic Marbles Set of plastic coated coloured round magnets. MA55010 £16.64 pr Neodymium Magnetic Cube Kit MA10182 Diameter Quantity £4.39 set 15 mm 20 This NeoCube kit contains 216 neodymium magnetic balls - small strong magnets that can be shaped into an infinite number of patterns. Great fun and Magnetic Pole Marbles useful for experimenting with e.g. for forming crystal structures or to show how carbon can be formed - like nanotubes, fullerenes and graphene, etc. Colour coded plastic cased magnetic marbles. Not only do they attract and repel, the colour coding reinforces that opposite attract and likes repel. Red will The magnets are strong and easy to attach to each other (and to anything only ever stick to blue. Supplied in a tub. Marble Dimensions (Dia): 15mm. magnetic) and it is simple and fun to form necklaces, bracelets, cubes and many other shapes and objects. To get an idea of how easy these are to use, just type neocube into YouTube and view the videos! Comes already formed into a cube and supplied in a small tin container. Each ball has a diameter of 4.7mm. Cube Dimensions (W x L x H): 28 x 28 x 28mm. MA130510 £18.75 kit MA93972 Quantity £20.65 pk 100 Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 495

PHYSICS Magnets Lodestone Compasses Lodestone Magnetic Needle Stand Natural magnetic ore. Supplied in pieces the size of a walnut. Comes complete with 75mm needle. Dimensions (H x W): 100 x 50mm. MA10197 £4.94 ea MA10176 £4.88 ea Magnetic Wands Compass Magnet & Water Bowl Kit Magnetic Wands Compass magnet, complete with translucent plastic bowl marked with compass points. Fill the bowl with water, float the magnet and watch it turn to point Set of plastic coated coloured wands. Magnet Dimensions (L x W x D): 65 x north. Bowl Dimensions (Dia.): 115mm. 26 x 14mm. Dimensions (L): 190mm. MA10184 Quantity £9.23 set MA104010 £8.04 kit 6 Magnetic Tape Pocket Compass Magnetic Tape Dial marked with points of the compass every 10º and full 360º scale. Dimensions (Dia.): 40mm. A roll of self adhesive rubber tape. Can easily be cut with scissors. Dimensions (W x D x L): 8 x 0.8mm x 10 metres. MA10177 £7.56 ea CO04607 £2.00 ea Metal Discs Orienteering Compass Metal Rimmed Discs An ideal compass for education made from shatterproof plexi. Measurements Pack of transparent coloured discs with metal rim. For use with magnets. in metric and imperial, with luminous pointer and large magnifier. Complete with neck cord and operating instructions. Dimensions (L x W x Dia.): 115 x 60 x 46mm. MA10183 Quantity £7.16 pk CO64625 £12.44 ea 100 496 …inspiring tomorrow’s scientists through practical science.

Magnets PHYSICS A B Gauss Guns Mini Gaussian Gun Kit Magnetic Accelerator Kit (Gauss Gun) This simple ‘magnetic accelerator’ consists of a sloping plastic channel which supports a row of 4 ball bearings, with a pair of neodymium magnets at the The gauss gun (also known as a gaussian gun or rifle) is an example of a end of the row to hold all the ball bearings together magnetically. Very slowly, magnetic linear accelerator and uses powerful neodymium magnets to launch you roll the loose ball bearing towards the magnets. As it gets close to the a steel sphere at high speed. magnets, the ball bearing and magnets are pulled together very rapidly, due to the magnets being so strong. As a result, rather like the Newton’s Cradle Magnets are held in place part way along the tube (using the steel washers apparatus, the ball bearing at the other end shoots off, at a surprisingly high provided), with two steel spheres on the ‘downhill’ side. Another sphere is rolled velocity. slowly towards the magnets and as it gets closer the magnetic attraction causes the sphere to accelerate considerably, resulting in the sphere impacting with the Not suitable for unsupervised younger children. magnets, transferring energy to the sphere at the opposite end of the magnets causing it to shoot off at high speed (similar to how Newton’s cradle works). Even faster speeds can be achieved by using a series of magnets and spheres. The magnets and steel spheres are contained within a clear plastic tube for safety reasons (neodymium magnets are brittle and can splinter, the spheres can be accelerated with some force). Kit includes 6 magnets and 5 steel spheres, washers and clear plastic tube with rubber end stopper to stop sphere. Instructions for use included. MA110901 A £37.96 kit Gauss Gun MA120100 £12.71 kit This demonstration of the Gauss gun effect uses a 660 mm long section of Floating Magnets acrylic tube to house rare earth (neodymium) magnets and ball bearings. One Floating Magnets, Coloured end is raised slightly to allow the first ball to begin its movement and there is a rubber stopper at the other end to prevent the ball bearings from flying out. Five coloured magnets, complete with free- The Gauss Gun demonstrates acceleration of a body in a magnetic field and standing rod, and presentation box. the conservation of momentum, using neodymium magnets to accelerate ball bearings. The moving components are safely enclosed in a clear plastic tube. This apparatus provides great discussion points on the nature and strength of magnetic fields, momentum, conservation of energy etc. MA150007 B £22.25 ea MA10166 Type Quantity £5.96 set MA94010 £13.13 set Small 5 Medium 3 Tel: +44(0)3333 442 443 Fax: +44(0)1270 250601 www.timstar.com 497

PHYSICS Energy Calorimeters Aluminium Calorimeters, Premium Copper Calorimeters, Economy With parallel sides, rolled rim and smoothed internal side walls. With parallel sides and rolled rim. HE18722 Height Diameter £6.88 ea HE82382 Height Diameter £1.95 ea HE18724 £10.43 ea HE82384 £7.56 ea 75 mm 50 mm 75 mm 50 mm £28.93 pk 100 mm 75 mm 100 mm 65 mm £30.09 pk Copper Calorimeters, Premium Calorimeter Tops With parallel sides, rolled rim and thicker than Insulating covers made from white PVC to fit average walls. calorimeters. Each cover has a central hole for a thermometer and a smaller hole for a stirrer. HE82376 Height Diameter £9.66 ea HE72365 Diameter Quantity HE82378 £5.63 ea HE72370 CA100645 75 mm 50 mm £15.94 ea 50 mm 5 100 mm 65 mm 75 mm 5 100 mm 90 mm Aluminium Calorimeters, Economy Calorimeter Jackets With parallel sides and rolled rim. Thick sleeves and a base mat to fit calorimeters. HE82324 Height Diameter £6.09 ea HE72350 Diameter Quantity £32.96 pk HE82326 £8.44 ea HE72355 5 £35.50 pk 75 mm 50 mm 50 mm 5 100 mm 75 mm 75 mm Magnetic Electrical SPECIFIC HEAT CAPACITIES AND OTHER PROPERTIES OF Resistivity No METALS AT 20˚C (293K) 10-8 Ω⋅m No No Name Melting point Specific Heat Density Thermal 2.65 No ˚C Capacity kg/m3 (g/cm3) Conductivity 5 No Aluminium, pure J/kg ˚C 8 Yes Aluminium, alloy 660 913 2710 (2.7) W/m-1 30 No 527 880 2800 (2.8) 201 No Brass 900-940 370 8500 (8.5) 180 12.7 Yes Bronze ~950 360 8800 (8.8) 110 6 No Chromium 1857 448 7200 (7.2) 180 1.7 No Cobalt 1495 420 8900 (8.9) 87 2.4 No Copper 1083 385 8930 (8.9) 69 10 Yes Gold 1067 132 19300 (19.3) 385 21 No 1537 450 7870 (7.9) 296 4.5 No Iron 327 126 11340 (11.3) 80 96 Yes Lead 650 246 1740 (1.7) 35 6 No Magnesium -39 140 13546 (13.5) 150 11 No Mercury 1453 460 8900 (8.9) 8 1.6 No Nickel 1770 136 21450 (21.5) 59 15 Platinum 960 235 10500 (10.5) 69 96 Silver 1427 420 7860 (7.8) 419 11 Steel, mild 1527 510 7930 (7.9) 63 5.9 Steel, stainless 232 226 7300 (7.3) 150 Tin 420 385 7140 (7.1) 65 Zinc 111 498 …inspiring tomorrow’s scientists through practical science.