PRODUCT CATALOGBreakthrough Sensing TechnologySensors | Switches
818.843.6211
Product Catalog | Table of Contents 4 About Hydra-Electric 12 18 Sensors 19 20 Introduction 22 Pressure Sensors 24 26 Gage Pressure Sensor Differential Pressure Sensors 28 Absolute Pressure Sensor 32 Temperature Sensors 33 Multi-Function Sensors 34 35 Switches 36 37 Introduction 38 Pressure Switches 39 40 Gage Pressure Switch (Series 1H) 41 Gage Pressure Switch (Series 7H) 42 Gage/Absolute Pressure Switch (Series 8H) 43 Differential Pressure Switch (Series 8H-D) 44 Gage Pressure Switch (Series 9H) 45 Gage Pressure Switch (Series 12H-G) 46 Absolute Pressure Switch (Series 12H-A) 47 Differential Pressure Switch (Series 12H-D) 48 High Pressure Diaphragm Switch (Series 15H-M) 50 High Pressure Piston Switch (Series 15H-PH) 52 Gage/Absolute Pressure Switch (Series 21H) 54 Gage/Differential/Vacuum Pressure Switch (Series 32H) Aneroid Altitude Pressure Switch (Series 44H) 55 High Pressure Diaphragm Switch (Series 51H) Gage / Differential / Vacuum Pressure Switch (Series 75H) Differential Pressure Switch (Series 83H-MF) Temperature Switches (Series 60H-T) Liquid Flow Switches (Series 45H-F) Other Switches Disclaimers
WHY HYDRA-ELECTRIC? A PROVEN INNOVATOR Pioneer in the aerospace industry since 1948 SOLVING THE UNSOLVABLE Pressure spikes, high cycle counts, pump ripple, burst diaphragms, broken wire bonds, and more CONTINUALLY IMPROVING A firm commitment to on time delivery, lean initiatives and superior quality4
THEN A track record of innovation since 1948In 1948, Hydra-Electric developed and patented the snap action sensingof pressure by means of the negative rate disc spring, employing anadditional trim spring for pressure adjustment. This environmentallysuperior powered snap action design has since become the standardfor critical aerospace applications.Hydra-Electric’s designs were selected for numerous early militaryand space applications, including P80, F86, F100 through F104,X15, SR71, and U2 Aircraft; Mercury, Gemini, Saturn and ApolloSpace Programs.Over the past six decades, Hydra-Electric’s products havebeen qualified for thousands of commercial and militaryavailable platforms.• Fixed wing and • Ships rotary aircraft • Armored tanks • Submarines• Missiles • UCAVs• RocketsNOW Our patented solutions are revolutionizing the sensor and switch markets.Hydra-Electric continues to innovate today, Our designs are utilized in a wide rangeproviding customers with the most robust, of critical aircraft systemsaccurate, and reliable sensors and switchesavailable in the marketplace. • Environmental control systems • Landing gear systemsCompany Highlights • Engine systems • Flight control systems• 95% in-house manufacturing • Hydraulic systems• Complete test lab on premises • Filter systems• ISO9001 and AS9100 Rev C (DNV certified) • Anti-icing systems• Substantial library of RTCA DO-160 and • Fuel systems • Crew oxygen systems MIL-STD qualifications • Force fight hydraulic systems • Waste water/potable water systems 5
UNPARALLELED COMMERCIAL AND MILITARY PROGRAM EXPERIENCE RECENT EXAMPLES (partial list): »» Airbus: »» Rotary-Military: • 320, 320neo, 330, 350, 380 • Bell Boeing V22 »» Boeing: • Sikorksy CH-53K • 737, 747, 757, 767, 787 • Boeing AH-64 »» Bombardier: »» Rotary-Commercial: • CRJ, CS 100/300, Global 5000/6000 & 7000/8000 • AW 149, 169, 189 • Bell 407, 429, 430, 525; AS265, EC120, »» Embraer: • 170, 190, E2, Phenom 300 EC135 • Sikorksy S-76, S-92, S-97 »» General Aviation: • MD 520, 530, 600 • Gulfstream G150, G280, G450, G500/600, G550/650 »» Engines: • Pilatus PC9, PC 12, PC24 • Rolls Royce Trent 900, 1100, XWB84K »» Military Fixed Wing: & 97K • P-8, F15, F16, F18, F35, C130, Eurofighter Typhoon, AV-8B Harrier II • GE H70, H75, H80 • PWC: PT6, 150, 207 • Snecma/Safran LEAP • Williams FJ446
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COMPANY CAPABILITIES RESEARCH AND DEVELOPMENT Each year Hydra-Electric dedicates resources for new R&D programs in conjunction with advancing customer needs. Through technology gap analysis, Hydra-Electric’s engineers target solutions to customers’ existing needs and to their upcoming challenges. ENGINEERING Hydra-Electric’s products are designed and developed by experienced engineers who specialize in Computer Aided Design, hydraulics, materials, finite element analysis, fluid dynamics, and advanced mechanical plus electrical engineering design skills. Using industry-standard aerospace CAD, our engineers meticulously conceive and detail some of the world’s most complex switch and sensor designs. Engineered designs are challenged by a range of detailed design reviews, manufacturing build studies, and other self-checks to ensure a robust design. 3D renderings are modeled with CAD software and transferred to two dimensions for basic customer drawings. MACHINING Hydra-Electric incorporates a very broad-based machine shop including machinery from basic cutting tools to state-of-the-art, multi-axis CNC (computer numerical control) machining centers. We machine 95% of our product components in-house involving aluminum, stainless steel and more exotic metals. Our machinists are among the best in the aerospace business; many have 20+ years experience in areas of drilling, turning, and milling metal parts, drawn from the rich local pool of the Burbank and Los Angeles aerospace industry. Our expert toolmakers bring strong capacities for design and manufacturing of complex progressive dies utilizing wire EDM, CNC and conventional machines. Supporting production, we have complete drilling, turning, boring and milling operations, as well as basic cutting, grinding and deburring. Our multi-axis, multi-spindle double turret CNC machines from Mori Seiki are particularly effective machines.8
Intelligent vertical integration ensures superior time-to-market. ASSEMBLY Hydra-Electric’s Assembly area is state-of-the-art, featuring many cutting-edge operations. At least 95% of the assembly process occurs in-house, with only a few outside processes, such as surface treatments and fluid charging, taking place outside the factory. Hydra-Electric employs skilled aerospace labor as much as possible in the assembly area, and any new employees are thoroughly trained on the critical assembly procedures during their first 30-90 days on the job. As with machining, there is a good pool of aerospace assembly talent in the aerospace- rich territory of Burbank and Los Angeles. Some of our more involved processes in assembly include TIG welding, laser welding, electron beam welding, and laser marking. We employ Lean Manufacturing techniques to get the job done. Using manufacturing work cells, Kanban, Kaizen events, Takt Time studies, quick changeover, level loading, and other “lean” ideals has made our work more efficient and resulted in better pricing for the customers. Principles of 6S and Value Stream Mapping have further enhanced our effectiveness. STATISTICAL PROCESS AND QUALITY CONTROLS Hydra-Electric employs Statistical Process Control (SPC) as an effective method for monitoring assembly processes, through the use of control charts. SPC uses statistical tools to observe the performance of the production process to predict significant deviations that may later result in rejected product. We have a full quality control (QC) philosophy that encompasses all aspects of the business. All departments must adhere to Quality standards; every department and employee receives quality training and works on QC. We’ve instilled the “do it right the first time” philosophy that is a part of any great manufacturing facility. Hydra-Electric’s overall QA and QC regulates the quality of incoming raw materials, assemblies, products, and components—plus all services related to production—and includes all management, production, and inspection processes. TESTING High-level product design and manufacturing for aerospace demands high- level product testing. Hydra-Electric specializes in product testing and has done so since our company’s early years. We house a full array of testing equipment, and conduct 100% of our basic product testing in-house, as we strongly believe in taking full control of all our product processing. In addition, we’ve found keeping testing in-house offers great cost and control advantages that are beneficial to the integrity of the end product. 9
ABOUT OUR PRODUCTS On the pages that follow, you’ll see just a fraction of the many envelope options available. Hydra-Electric also offers custom envelopes to fit your needs. Our standard, commercially available designs are obtainable with a wide variety of connectors, mounts, pressure fittings and other attachment options. Hydra-Electric engineers can also custom design a sensor or switch to meet your specified requirements. To order or discuss your requirements: Contact Hydra-Electric at 818.843.6211 [email protected]
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SENSORSBreakthrough AerospaceSensor/Transducer TechnologyOur solutions are designed to deliver high accuracy, extendservice life, eliminate pressure spike damage, remain safeat millions of pressure cycles, stay protected from electricaltransients, and resist electromagnetic HIRF interference.Sensor Technologies:• Pressure• Temperature• Multi-Function 13
Hydra-Electric’s sensors excel where older technologies fail Our sensors and transducers are designed to • Deliver high accuracy • Extend service life • Eliminate pressure spike damage • Remain safe at millions of pressure cycles • Stay protected from electrical transients • Resist electro-magnetic HIRF interference14
What’s different about Hydra-Electric’ssensing technologyOUR SENSORS AND TRANSDUCERS CAN ALLOW YOU TO:»» Solve problems you didn’t know could be solved Error»» Achieve linear accuracy over a wider temperature range...and better manage your • Survive high speed impulses error budget • Survive pump ripple No need to compromise on the zero and span • Survive high cycle counts of one million or more error at extended temperatures. Sensor error • Avoid burst diaphragms and broken wire bonds bands are flat throughout all temperatures, for either amplified or millivolt output.»» Achieve near infinite life In materials science, fatigue is the weakening Error band with other sensors of a material caused by repeatedly applied loads. This cyclic loading can cause progressive Temperature structural damage and failure even if it is well below the ultimate strength of the material. Error band with Hydra-Electric In these high-cycle fatigue situations, performance is commonly characterized by the material Stress-cycle (S-N) failure curve, also known as a Wöhler curve. The graph below shows the magnitude of a cyclic stress (S) or force allowable to achieve the number of cycles to failure (N). At Hydra-Electric, we size the sensor for the operating pressure range; stress can then be limited to achieve an almost infinite number of pressure cycles. Error S-N Curve for Stainless SteelStress (MPa) Fatigue Limit Hydra- Temperature Life (# of cycles) Electric’s operating »» Tailor to any operating parameter • Accuracy point • Sensitivity • Output format • Input/output impedance • Amplified/non-amplified • EMC (MIL-STD-461, DO160) 15
Performance & Versatility PERFORMANCE • High-temperature amplified sensing (150°C and 225°C for pressure sensing, 300°C for temperature sensing) • Low-temperature amplified sensing (-55°C) • High EMI interference immunity (DO-160, MIL-STD-461) • Lightning protection (DO-160 Level 4) • High common mode pressure and low differential pressure • Impulse pressure spike protection • 1 million to infinite pressure cycle life • MTBF > 300,000 hours to >1 million hours airborne uninhabited cargo environment • 2x proof and 3x full scale burst pressure with the ability to scale higher • Shock >100 g’s • Vibration >60 g sine on random VERSATILITY • 5 to 30,000 PSIA, PSIG, PSID ranges • Amplified to any output range within 0 to 28 volts DC • Millivolt bridge output • High common mode pressure and low differential pressure • Input voltage ranges 5 to 60 VDC FEATURES • Active thermal compensation with lightning protection and high-temperature electronics available • Weight 2 to 4 ounces typical • Ideal bridge millivolt output • Power – Ratiometric or independent of power supply • Combined pressure and temperature sensors, multiple pressure, redundant channels16
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PRESSURE SENSORS Hydra-Electric’s design advances incorporate patented technologies, providing specifications and operating levels not seen previously in sensor systems.18
Environmentally Protected Note: Product image shown represents just one of the many envelope options we can offer. We GAGE PRESSURE SENSOR can design a custom envelope to fit your needs.The gage sensor utilizes a unique, highly accurate sense element thateliminates common failure points such as wire bonds, flexible diaphragmsand oil-filled headers while maintaining the advantages of a fully weldedand sealed stainless steel assembly. Gage-filtered reference ports or fullysealed housings are standard options. All amplifying and conditioningcircuits are isolated from the pressure media and are protected fromexposure to harmful gases and liquids in the environment.Pressure measurement utilizes a balanced, fully active resistive bridge,with unique patented conditioning to provide a highly accurate low noisesignal. Specialized design features allow the error band to remain flatthroughout the entire operating temperature and pressure ranges. Effectsof EMC, EMP and inadvertent misconnection are eliminated throughsimplified design and special protective circuit elements. Specializedtailoring of signals for balanced output, selectable input and outputimpedance, common mode voltage (non-amplified bridge), and time-constant response are simply configured.FEATURES APPLICATIONS• Standard and sealed gage sensors available • Hydraulic, oil, fuel, cooling fluids,• All welded stainless steel construction water, transmission fluid• Machined metal isolation – no welded diaphragm• Solid internal construction – no wire bonds or loose connections • Fast dynamic transient pressure• ESD, transient, lightning and EMC protected response and protection (amplified and millivolt versions) applications • Cyclic pressure operation• RTD temperature sensor availableOperationSystem to Ranges from 1 PSI to 30,000 PSI Proof to 2X full scale (45,000 PSI limit) Burst Minimum of 3X full scaleElectrical Amplified 0.5 to 4.5 VDC with 7 to 36 volts excitation or non-amplified 0 to 100 mV, 1K to 5K selectable bridge impedance, 4-20 mA current outputEnvironmental Ambient ConditionsTemperature -67°F (-55°C) to 257°F (135°C) with options for 302°F (150°C), media to 250°CVibration 5 to 2000 Hz up to 20 g’s Shock 100 g’sService Life 10 million pressure cycles minimumWeight 5 oz. (approx.)EMI/Lightning DO-160, MIL-STD-461 extended operation and HIRFHydra-Electric can fulfill your custom needs beyond the above criteria. 19
DIFFERENTIAL PRESSURE SENSORThe differential sensor is available with several sensor technologies. For low- Note: Product image shown represents just onepressure ranges in clean air, a PRT sense element with gold or “protective of the many envelope options we can offer. Wecoating” provides the differential reading. Higher-pressure units and those in fluid can design a custom envelope to fit your needs.applications utilize either an oil-filled PRT system or a dual thin film sensor.With any of the sense options, the measurement of pressure occurs in a balanced,fully active resistive bridge, with conditioning through a unique electronic circuit.Immunity from external electrical effects and inadvertent misconnection isprovided through simplified design and special protective circuit elements.A patented signal-conditioning circuit provides highly precise performancethroughout the entire operating temperature range. The accuracy and thermalerror are the same at the hottest and coldest extremes as at room temperature.Both amplified and millivolt output options are available.Units are available with a wide range of welded connectors. Pressureinterfaces using standard G1/4, NPT, coned and others, as well as fullycustom, are available. Body size and shape is suited to the applicationswith options ranging from 1 inch round, rectangular or square.FEATURES APPLICATIONS• All welded stainless steel construction • Hydraulic, oil, fuel, cooling fluids,• Machined metal isolation – no welded diaphragm water, transmission fluid• Solid internal construction – no wire bonds or loose connections• ESD, transient, lightning and EMC protected • Fast dynamic transient pressure response and protection (amplified and millivolt versions) applications• RTD temperature sensor available • Cyclic pressure operationOperation System to Line pressure: Ranges from 1 to 30,000 PSI Proof to 45,000 PSI Burst Minimum of 3X full scaleElectrical Amplified 0.5 to 4.5 VDC with 7 to 36 volts excitation or non-amplified 0 to 100 mV, 1K to 5K selectable bridge impedance, 4-20 mA current outputEnvironmental Ambient ConditionsTemperature -67°F (-55°C) to 257°F (135°C) with options to 302°F (150°C), media to 250°C Vibration 5 to 2000 Hz up to 20 g’s Shock 100 g’sService Life 10 million pressure cycles minimum*Weight 6-8 oz. (approx.)EMI/Lightning DO-160, MIL-STD-461 extended operation and HIRFHydra-Electric can fulfill your custom needs beyond the above criteria. *See Hydra-Electric white paper on Sense Element Pump Ripple Fatigue20
HIGH LINE PRESSUREDifferential Pressure SensorExtend differential pressure readings to applications where the maximum Note: Product image shown represents just onedifference is a small fraction of the full line pressure. Maintain the robust survival of the many envelope options we can offer. Wecapabilities even when high side or low side reaches the full extent of pressure can design a custom envelope to fit your needs.up to proof. Where percent of differential reading is a small fraction of fullscale, achieve significant accuracy even over the full limits of line pressure.The measurement of pressure occurs in a balanced, fully active resistivebridge, with conditioning through a unique electronic circuit. Immunityfrom external electrical effects and inadvertent misconnection is providedthrough simplified design and special protective circuit elements.A patented signal-conditioning circuit provides highly precise performancethroughout the entire operating temperature range. The accuracy andthermal error are the same at the hottest and coldest extremes as at roomtemperature. Both amplified and millivolt output options are available.Units are available with a wide range of welded connectors. Pressure interfaces using standardG1/4, NPT, coned and others, as well as fully custom, are available. Body size and shape issuited to the applications with options ranging from 1 inch round, rectangular or square.FEATURES APPLICATIONS• All welded stainless steel construction • Hydraulic, oil, fuel, cooling fluids,• Machined metal isolation – no welded diaphragm water, transmission fluid• Solid internal construction – no wire bonds or loose connections• ESD, transient, lightning and EMC protected • Fast dynamic transient pressure response and protection (amplified and millivolt versions) applications• RTD temperature sensor available • High line pressure-low differential pressure • Cyclic pressure operationOperationSystem to Line pressure: Ranges from 1 to 30,000 PSI Differential pressure: Ranges from 10% to full line pressure Proof to 45,000 PSI Burst Minimum of 3X full scaleElectrical Amplified 0.5 to 4.5 VDC with 7 to 36 volts excitation or non-amplified 0 to 100 mV, 1K to 5K selectable bridge impedance, 4-20 mA current outputEnvironmental Ambient ConditionsTemperature -67°F (-55°C) to 257°F (135°C) with options to 302°F (150°C), media to 250°CVibration 5 to 2000 Hz up to 20 g’s Shock 100 g’sService Life 10 million pressure cycles minimum*Weight 6-8 oz. (approx.)EMI/Lightning DO-160, MIL-STD-461 extended operation and HIRF *See Hydra-Electric white paper on Sense Element Pump Ripple FatigueHydra-Electric can fulfill your custom needs beyond the above criteria. 21
Extended ServiceABSOLUTE PRESSURE SENSORThe absolute sensor utilizes a unique, highly accurate thin film media isolated senseelement in a fully welded and sealed assembly. Measurement elements providesensing without the need for an isolation diaphragm. A “can style” isolation flexureprovides separation of the measuring and conditioning circuits from the pressuremedia. Internal components are protected from exposure to harmful gases andliquids in the environment through a hermetically sealed enclosure and connector.Measurement of pressure occurs in a balanced, fully active resistive bridge, withconditioning through a unique electronic circuit to provide a highly accurate lownoise signal. Immunity from external electrical effects and inadvertent misconnectionis provided through simplified design and special protective circuit elements.A patented signal-conditioning circuit provides highly precise performancethroughout the entire operating temperature range. The accuracy andthermal error are the same at the hottest and coldest extremes as at roomtemperature. Both amplified and millivolt output options are available.Units are available with a wide range of welded connectors. Pressure interfaces Note: Product image shown represents just oneusing standard G1/4, NPT, coned and others, as well as fully custom, are of the many envelope options we can offer. Weavailable. Body size is typically 1 inch, and overall weight less than 4 ounces. can design a custom envelope to fit your needs.FEATURES APPLICATIONS• All welded stainless steel construction • Hydraulic, oil, fuel, cooling fluids,• Machined metal isolation – no welded diaphragm water, transmission fluid• Solid internal construction – no wire bonds or loose connections• ESD, transient, lightning and EMC protected • Fast dynamic transient pressure response and protection (amplified and millivolt versions) applications• RTD temperature sensor available • Cyclic pressure operationOperation System to Ranges from 1 PSI to 30,000 PSI Proof to (45,000 PSI limit) 2X full scale Burst Minimum of 3X full scaleElectrical Amplified 0.5 to 4.5 VDC with 7 to 36 volts excitation or non-amplified 0 to 100 mV, 1K to 5K selectable bridge impedance, 4-20 mA current outputEnvironmental Ambient ConditionsTemperature -67°F (-55°C) to 275°F (150°C) with options to 302°F (150°C), media to 250°C Vibration 5 to 2000 Hz up to 20 g’s Shock 100 g'sService Life 10 million pressure cycles minimum*Weight 3-5 oz. (approx.)EMI/Lightning N/AHydra-Electric can fulfill your custom needs beyond the above criteria. *See Hydra-Electric white paper on Sense Element Pump Ripple Fatigue22
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TEMPERATURE SENSORS We offer robust temperature sensors with fast response times, media isolation and high pressure operation.24
Standard and Extended Range TEMPERATURE SENSORTemperature measurement utilizes a platinum RTD. Both wire wound andthin-film RTDs are available. Thin-film RTDs are used in applications requiringdurability under high vibration, or where physical size is limited. The RTDsare potted into a stainless steel cover for strength and quick response.Units are available with a wide range of welded connectors.Standard and fully custom interfaces are available. Body sizeand shape is suited for a wide variety of applications. Sensor canbe used with any media compatible with stainless steel.Note: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs.FEATURES APPLICATIONS• Open and hermetic design available • Hydraulic, oil, fuel, cooling fluids,• All welded stainless steel construction water, transmission fluid• Solid internal construction – no wire bonds or loose connections• Resistance output and amplified voltage output available • Shrouded, fast response or• ESD, transient, lightning and EMI protection circuitry hazard protected sensing available for amplified voltage outputOperation Accuracy IEC-751 Class A or B Resistance@ 0°C 100 ohm or 1K ohm Max. Current 2mA recommended operating max (resistance output)Recommended Current 1mA Max (resistance output)Electrical RTD resistance output or amplified voltage or 4-20 mA outputEnvironmental Temperature Range -100°C to +250°C standard, +300°C extendedSurvival Temperature -100°C to +500°C media temp Vibration 5 to 2000 Hz up to 20 g’sService Life Shock 100 g’s 1000 temperature cyclesWeight 5 oz. (approx.)Hydra-Electric can fulfill your custom needs beyond the above criteria. 25
MULTI-FUNCTION SENSORS A multitude of options to meet your requirements26
Hydra-Electric’s multi-functionsensor capabilities include:• Combined temperature/pressure options• Multiple pressure-sensing elements• Mechanical switch + sensor solutionsWith Hydra-Electric, you can combine temperature and pressure sensinginto one device. Amplified and non-amplified can be incorporatedinto one unit. Gage can be mixed with absolute, which can be mixedwith differential, which can be combined with redundant options.In addition to having multiple sensors, we can provide both electricaland mechanical isolation between those multiple channels. It is alsopossible to put a switch and a sensor into the same package.Many of our customers are asking for numerous redundant sensorsin one package. In response, we have developed innovative designswhereby if one of the channels fails, the other channels can still work. 27
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SWITCHES Aerospace Switches Over six decades ago, Hydra-Electric developed and patented the snap action sensing of pressure by means of the negative rate disc spring, employing an additional trim spring for pressure adjustment. This environmentally superior powered snap action design has since become the standard for critical aerospace applications. Switch Technologies: • Pressure • Temperature • Liquid Flow • Other Switch Products 29
Hydra-Electric switches are the industry standard for performance and reliability Premium quality products from the industry pioneer and inventor of the negative rate disk spring design Highest level of accuracy for achieving the deadband Capabilities for custom design, enhanced design along with our many standard designs Superior manufacturability from having perfected building the rough set30
OUR MOST POPULAR SWITCH SERIES 8H Series 12H Series 15H Series 45H Series 60H Series Pressure: Pressure: Pressure:Type Gage, Absolute & Gage, Absolute & Membrane (M); Liquid Flow TemperatureMediaSystem to Differential* Differential* Piston Switch (PH)Proof toBurst Fuel, oil, air Fuel, oil, air, water Fuel, oil, hydraulic Fuel, oil, Fuel, hydraulic,Actuation hydraulic, coolant lube oilDeadband 700 PSI 300 PSIG M: 3770 PSI 250 PSI 3000 PSI PH: 5050 PSIElectrical 1050 PSI 572 PSIG M: 5250 PSI 375 PSI 4500 PSITemperature 1400 PSI PH: 7500 PSIVibration M: 7614 PSI Not applicable 7500 PSIShock PH 12,500 PSI 9000 PSI 10 PSI to 400 PSI 1.5 PSIG to M: 50 PSIG to 0.25 gpm to 10°F (-12°C) to 60 PSIG 3240 PSIG 30 gpm 500°F (260°C) PH: 35 PSI to 4,700 PSI 10% to 40% 8% to 20% 12% to 40% 12% to 40% 12% to 40% of actuation of actuation of actuation of actuation of actuation set point set point set point set point set point Hermetically Hermetically Hermetically Hermetically Hermetically sealed SPDT sealed SPDT sealed SPDT sealed SPDT sealed SPDT or DPDT, or DPDT, or DPDT, or DPDT, or DPDT, 2 mA to 7 A res. 2 mA to 7 A res. 2 mA to 7 A res. 2 mA to 7 A res. 2 mA to 7 A res. @ 5-32 VDC @ 5-32 VDC @ 5-32 VDC @ 5-32 VDC @ 5-32 VDC -65°F (-54°C) to -67°F (-55°C) to M: -65°F (-54°C) -65°F (-54°C) to -65°F (-54°C) to +400°F (204°C) 320°F (160°C) to 350°F (177°C) +180°F (+82°C) 350°F (177°C) PH: -65°F (-54°C) to 275°F (135°C) 5 to 2000 HZ 5 to 2000 HZ 5 to 2000 HZ 5 to 2000 HZ 5 to 2000 HZ up to 40 g’s up to 30 g’s up to 30 g’s up to 20 g’s up to 20 g’s 100 g’s 100 g’s 100 g’s 25 g’s 50 g’s M: 100,000 cyclesService Life 100,000 cycles 200,000 cycles PH: 250,000 75,000 cycles 75,000 cycles 4 oz cyclesWeight (approx.) 3.5 oz 4 oz M: 3.5 oz 4 to 24 oz PH: 5 oz* Levels shown for Gage only. See detail pages for Absolute and Differential. 31
PRESSURE SWITCHES Hydra-Electric produces and services high performance electromechanical products for pressure, temperature and liquid flow sensing. Hydra-Electric pressure switches can be used in gage, differential, vacuum, altitude and airspeed applications and on hydraulic, anti-ice, pneumatic, lube oil, fuel, potable water or cryogenic systems. Our pressure switches are designed to reliably perform over the long term, even in the harshest environments and under high vibration and shock conditions.32
SERIES 1HGage Pressure SwitchOperation System to 300 PSI Proof to 450 PSI Burst Not applicable Actuation 1.5 PSI to 80 PSI Deadband 10% to 45% of actuation set pointElectrical Hermetically sealed SPDT or DPDT, 100 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditions Temperature -65°F (-54°C) to 250°F (121°C) Vibration 5 to 2000 Hz up to 30 g’s Shock 100 g’sService Life 75,000 cyclesWeight 5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.Economical pressure switch design with low to moderate set pointsfor fuel, pneumatic or lube oil system applications. Switch is readilyserviced for long life. Compact lightweight aluminum constructionwith optional hermetically sealed electrical switching assembly.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 33
SERIES 7HGage Pressure SwitchOperation System to 2000 PSI Proof to 2500 PSI Burst Not applicable Actuation 5 PSI to 120 PSI Deadband 10% to 45% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 100 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditions Temperature -65°F (-54°C) to 300°F (149°C) Vibration 5 to 2000 Hz up to 30 g’s Shock 100 g’sService Life 75,000 cyclesWeight 3 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria. Miniaturized, lightweight design for low to moderate pressure pneumatic, fuel or lube oil applications. Can withstand high system and proof pressure requirements. Welded stainless steel construction with hermetically sealed electrical switching assembly when required. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.34
SERIES 8HGage / Absolute Pressure SwitchOperationSystem to 700 PSI Proof to 1050 PSI Burst 1400 PSIActuation 10 PSI to 400 PSIDeadband 10% to 40% of actuation set pointElectrical Hermetically sealed SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -65°F (-54°C) to 400°F (204°C)Vibration 5 to 2000 Hz up to 40 g’s Shock 100 g’sService Life 100,000 cyclesWeight 3.5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.Miniaturized lightweight switch with high vibration and shock resistancefor a wide range of pneumatic, fuel or oil pressure applications.Suitable for harsh environments. Fireproof. Welded stainless steelconstruction with a hermetically sealed switching assembly.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 35
SERIES 8H-DDifferential Pressure SwitchOperationSystem to 300 PSIG both ports Proof to 600 PSIG both ports Burst 800 PSI both portsActuation 3 PSID to 100 PSIDDeadband 8% to 30% of actuation set pointElectrical Hermetically sealed SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -67°F (-55°C) to 400°F (204°C)Vibration 5 to 2000 Hz up to 40 g’s Shock 100 g’sService 100,000 cyclesWeight 5.5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria. Miniaturized, technically advanced design for differential fuel, oil and pneumatic pressure applications. Qualified for turbine engine installations. Suitable for harsh environments. Fireproof. Welded all stainless steel construction with a hermetically sealed switching assembly. Fitting with a specific internal pressure pulsation dampener. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.36
SERIES 9HGage Pressure SwitchOperation System to 150 PSI Proof to 250 PSI Burst 350 PSI Actuation 6.0 PSIG to 61 PSIG Deadband 12% to 45% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditions Temperature -65°F (-54°C) to 275°F (135°C) Vibration 5 to 2000 Hz up to 20 g’s Shock 100 g’sService 75,000 cyclesWeight 4 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.Miniaturized, lightweight switch design for low pressure pneumatic,fuel or oil applications. Suitable for oxygen or cabin pressure systems.Aluminum construction and hermetically sealed electrical switchingassembly when required.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 37
SERIES 12H-GGage Pressure SwitchOperation System to 300 PSIG Proof to 572 PSIG Burst 750 PSI Actuation 1.5 PSIG to 60 PSIG Deadband 8% to 20% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditions Temperature -67°F (-55°C) to 320°F (160°C) Vibration 5 to 2000 Hz up to 30 g’s Shock 100 g’sService 200,000 cyclesWeight 4 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria. Very precise, highly reliable performance for low to moderate pneumatic, fuel or oil pressure applications. Suitable for extreme temperature environments. Fireproof. Lightweight welded stainless steel construction with a hermetically sealed electrical switching assembly. Qualified to rigid MIL-DTL-9395 standards. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.38
SERIES 12H-AAbsolute Pressure SwitchOperationSystem to 200 PSI Proof to 300 PSI Burst 400 PSIActuation 1.0 PSIA to 100 PSIADeadband 3% to 20% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -67°F (-55°C) to 200°F (93°C)Vibration 5 to 2000 Hz up to 30 g’s Shock 100 g’sService 300,000 cyclesWeight 5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.High-precision absolute pressure switch, designed for pneumatic, fuel orlube oil system applications. Suitable for extreme temperature environments.Fireproof. Welded stainless steel construction with a hermetically sealedelectrical element. Qualified to rigid MIL-DTL-9395 standards.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 39
SERIES 12H-DDifferential Pressure SwitchOperationSystem to 200 PSIG Proof to 300 PSIG (Hi > Lo) Burst 400 PSIGActuation 1.0 PSID to 100 PSIDDeadband 8% to 20% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -67°F (-55°C) to 400°F (204°C)Vibration 5 to 2000 Hz up to 30 g’s Shock 100 g’sService 100,000 cyclesWeight 5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria. High-precision differential pressure switch, designed for pneumatic, fuel or lube oil system applications. Suitable for extreme temperature environments. Fireproof. Welded stainless steel construction with a hermetically sealed electrical element. Qualified to rigid MIL-DTL-9395 standards. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.40
SERIES 15H-MHigh Pressure Diaphragm SwitchOperationSystem to 3770 PSI Proof to 5250 PSIG Burst 7614 PSIGActuation 50 PSIG to 3240 PSIGDeadband 12% to 40% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -65°F (-54°C) to 350°F (177°C)Vibration 5 to 2000 Hz up to 30 g’s Shock 200 g’sService 100,000 cyclesWeight 3.5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.Lightweight diaphragm design for high-pressure pneumatic, oil or hydraulicsystem applications. Internal snubber is available for dampening high pressurespikes and pump ripple. Durable, vibration and shock resistant. Weldedstainless steel construction. Qualified to rigid MIL-DTL-9395 standards.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 41
SERIES 15H-PHHigh Pressure Piston SwitchOperationSystem to 5050 PSI Proof to 7500 PSI Burst 12,500 PSIActuation 35 PSI to 4700 PSIDeadband 12% to 40% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, TPDT available, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -65°F (-54°C) to 275°F (135°C)Vibration 5 to 2000 Hz up to 30 g’s Shock 100 g’sService 250,000 cyclesWeight 5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria. Long-life piston switch design for medium to high pressure oil or hydraulic system applications. Special piston design provides narrow set point deadbands and excellent vibration, shock and pressure surge resistance. Welded stainless steel construction with optional hermetically sealed electrical switching assembly. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.42
SERIES 21HGage / Absolute Pressure SwitchOperationSystem to 400 PSI Proof to 600 PSI Burst 800 PSIActuation 2.5 PSI to 200 PSIDeadband 10% to 40% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 2 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -65°F (-54°C) to 400°F (204°C)Vibration 5 to 2000 Hz up to 20 g’s Shock 100 g’sService 200,000 cyclesWeight 4 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.Durable gage or absolute pressure switch for pneumatic, fuel orlube oil system applications. Suitable for extreme temperatureenvironments. Fireproof design. Welded all stainless steel constructionwith a hermetically sealed electrical switching element.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 43
SERIES 32HGage / Differential / Vacuum Pressure SwitchOperationSystem to Not applicable Proof to 447 PSI Burst Not applicableActuation 0.036 PSI to 10.0 PSIDeadband 10% to 45% of actuation set pointElectrical Hermetically sealed (optional) SPDT or DPDT, 50 mA Max @ 5-32 VDCEnvironmental Ambient conditionsTemperature -65°F (-54°C) to 300°F (149°C)Vibration 5 to 2000 Hz up to 15 g’s Shock 25 g’sService 100,000 cyclesWeight 13 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria. Low settings and narrow differential capabilities for demanding pneumatic, fuel or oil pressure applications. Aluminum construction with hermetically sealed electrical assembly when required. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.44
SERIES 44HAneroid Altitude Pressure Switch(Absolute Pressure Indication)OperationSystem to Not applicable Proof to 29 PSIA Burst Not applicableActuation 0.3” HgA to 30” HgADeadband 12% to 45% of actuation set pointElectrical Hermetically sealed SPDT or DPDT, 50 mA Max @ 5-32 VDCEnvironmental Ambient conditionsTemperature -65°F (-54°C) to 200°F (93°C)Vibration 5 to 2000 Hz up to 20 g’s Shock 15 g’sService 50,000 cyclesWeight 5 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.Highly sensitive, reliable aneroid capsule and negative rate discspring designed pressure switch suitable for altitude or absolutepressure sensing applications. Barometric pressure range from sealevel to 100,000 feet. Lightweight aluminum construction.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 45
SERIES 51HHigh Pressure Diaphragm Pressure SwitchOperationSystem to 4000 PSIG Proof to 6000 PSIG Burst 7500 PSIGActuation 150 PSI to 3400 PSIDeadband 12% to 40% of actuation set pointElectrical Environmentally sealed SPDT or DPDT, 50 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -67°F (-55°C) to 275°F (135°C)Vibration 5 to 2000 Hz up to 25 g’s Shock 100 g’sService 50,000 cycles minimumWeight 3 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria. Economical, miniaturized diaphragm design for high pressure pneumatic, oil or hydraulic systems. Internal snubber is available for dampening high-pressure spikes and pump ripple conditions. Lightweight aluminum construction with an environmentally sealed electrical switching element. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.46
SERIES 75HGage / Differential / Vacuum Pressure SwitchOperationSystem to 15.0 PSI both ports simultaneously Proof to 30.0 PSI both ports simultaneously Burst Not applicableActuation 1.0” H2O to 30” H2ODeadband 10% to 45% of actuation set pointElectrical Hermetically sealed SPDT or DPDT, 100 mA to 7 A Res @ 5-32 VDCEnvironmental Ambient conditionsTemperature -65°F (-54°C) to 160°F (71°C)Vibration 5 to 2000 Hz up to 10 g’s Shock 25 g’sService 75,000 cyclesWeight 16 to 24 oz. (approx.)Hydra-Electric can fulfill your custom needsbeyond the above criteria.Highly sensitive, inches of H2O pressure design with proven performance inmonitoring and control of low-pressure pneumatic systems. Large diaphragmarea coupled with a negative rate disc spring provides narrow differentialsettings and close operating tolerances. Lightweight construction.NOTE: Product image shown represents just one of the many envelopeoptions we can offer. We can design a custom envelope to fit your needs. 47
SERIES 83H-MFMulti-Function Pressure Switch(Impending Filter Bypass Indication) Operation System to 200 PSI both ports simultaneously Proof to 340 PSI both ports simultaneously Burst 400 PSI both ports simultaneously Actuation 6 PSID to 60 PSID Deadband 12% to 40% of actuation set point Electrical Hermetically sealed (optional) SPDT or DPDT, TPDT available, 2 mA to 7 A Res @ 5-32 VDC Environmental Ambient conditions Temperature -65°F (-54°C) to 375°F (191°C) Vibration 5 to 2000 Hz up to 45 g’s Shock 25 g’s Service 100,000 cycles Weight 6 oz. (approx.) Hydra-Electric can fulfill your custom needs beyond the above criteria. Low profile, lightweight design for differential fuel or oil filter impending bypass indication. Fitted with a special internal pressure pulsation dampener, spring loaded bypass valve and an optional R.T.D. Suitable for high vibration engine installations. Welded stainless steel construction with a hermetically sealed electrical assembly. NOTE: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.48
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TEMPERATURE SWITCHES Our temperature switches feature a lightweight, miniaturized design for hydraulic, oil and fuel system temperature sensing in ambient conditions from -65°F to 350°F. All Hydra-Electric switches offer premium quality and the highest level of accuracy and reliability.50
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