การพัฒนาปรับปรุงเปรียบเทียบและทดสอบมาตรฐานต้นแบบเครื่องวัดฝุ่นละอองในอากาศแบบใช้หลักการเชิงไฟฟ้าสถิตเพื่อไปสู่มาตรฐานเครื่องมือวัดสากล US EPA (พานิช อินต๊ะ,2562)

Commercial Tolerance (Machining Process) Division of Medium 2 - M8x1.25 เกลยี วซ้าย dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 90 30 60<X<100 +- 0.5 80 22.60 70.50 10 60 0 100<X<250 +- 0.8 250<X +- 1 10 0 1.70 10 4 - 4.20 THRU 22 8 4.5 34 2 - 6.40 12.5 41 44 1.70 51 2 - 4.95 10 90 86 80.50 78 63 60.50 55 51 0 25 22.50 21 20 12.50 5 4 2.50 0 4 x 3.30 8 R2 M4x0.7 - 6H 8 ร่องใส่ O-Ring APPROVED CHECKED DRAWING PROJECTION PART NAME Wittaya.S Wittaya.S Somchay SURFACE MATERAIL Partic Al QUAN 1

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 25 22.50 21 20 5 4 2.50 0 ร่องใส่ O-Ring 0 4 0 12.20 14.70 2.20 22.20 29.70 4.40 R2 32.20 1.40 40.40 4.40 44.40 4 x 3.30 8 รอ่ งใส่ O-Ring M4x0.7 - 6H 8 Insert Pin 5 mm. PART NO. Drawing No. CN0359-09-039 Customer ศูนย์เทคโนฯ 1 cle Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 0 35.70 0.75 42.70 47.70 52.70 1.50 R0.75 5 APPROVED CHECKED DRAWING PROJECTION PART NAME Particl Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 57.70 12 4.87 M6x1 M8x1.25 PART NO. Drawing No. CN0359-09-040 Customer ศูนย์เทคโนฯ 2 le Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 0 27 5.67 32 37 10° 42 M6x1 M8x1.25 2 5 APPROVED CHECKED DRAWING PROJECTION PART NAME Particl Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 12 PART NO. Drawing No. CN0359-09-041 Customer ศูนยเ์ ทคโนฯ 3 le Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 20 23 0 2.10 THRU 6.80 5 23 M8x1.25 - 6H 5 APPROVED CHECKED DRAWING PROJECTION PART NAME Partic Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Pom Black 1

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 13 23 M8x1.25 เกลียวซา้ ย PART NO. Drawing No. CN0359-09-042 Customer ศูนยเ์ ทคโนฯ 4 cle Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 20 5 0 1.60 THRU 6.80 5 23 M8x1.25 - 6H 5 APPROVED CHECKED DRAWING PROJECTION PART NAME Partic Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Pom Black 1

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 13 23 32 6.30 M8x1.25 เกลยี วซ้าย PART NO. Drawing No. CN0359-09-043 Customer ศูนย์เทคโนฯ 5 cle Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 +0.05 2- 5 0 6 0 6 12 14.50 20 29.50 40 70 90 95.50 98 107 55 10 49 49 4 x 3.30 10 46.50 M4x0.7 - 6H 8 41.20 29 16.80 11.50 9 6 0 2 - 6.40 8 ร่องใส่ O-Ring APPROVED CHECKED DRAWING PROJECTION PART NAME Partic Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Bakelite 1

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 113 0 1.70 8 16 6.40 55 2 - Fitting 1/8 29 0 4 x 4.50 THRU 0 8 4.50 PART NO. Drawing No. CN0359-09-000 Customer ศูนย์เทคโนฯ 6 cle Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 0 4 40.40 0 4 21 25 4 - 4.20 THRU APPROVED CHECKED DRAWING PROJECTION PART NAME Wittaya.S Wittaya.S Somchay SURFACE MATERAIL Partic AL QUAN 1

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 44.40 3 25 PART NO. Drawing No. CN0359-09-000 Customer ศูนย์เทคโนฯ 7 cle Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 0 4 35 39 0 4 21 25 4 - 4.20 THRU APPROVED CHECKED DRAWING PROJECTION PART NAME Particle Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN 1 AL

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S 3 25 PART NO. Drawing No. CN0359-09-000 Customer ศูนยเ์ ทคโนฯ 8 e Charger SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 0.50 X 45° 5 15 3 0 4 9.46° APPROVED CHECKED DRAWING PROJECTION PART NAME Particl Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS304 2

Rev. Date Contens Approved A 08/09/59 NEW Wittaya.S PART NO. Drawing No. CN0359-09-000 Customer ศูนย์เทคโนฯ 9 le Charger SCALE NTITY UNIT UNIQUE PRECISION 2 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 CB 250<X +- 1 B C APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN 1

Rev. Date Contens Approved A Wittaya.S PART NO. Drawing No. CN0359-09-000 SCALE Customer Dr. K Up Electrometer NTITY UNIT UNIQUE PRECISION 1 Set mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium 90° dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 100 60<X<100 +- 0.5 P.C.D. 35 100<X<250 +- 0.8 45° 250<X +- 1 8 P.C.D. 95.50 2 x 1.95 5 20 95 D 0 16 1 0 5 4 THRU 1.70 20 29 5 20 67.50 73.50 67.50 73.50 D APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Brass 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S Note 1.O-Ring 2 x 46 x 50 = 2 Pcs. 2.O-Ring 2 x 88 x 92 = 1 Pcs. 89.60 1.70 M88x1 86 80 50 46 Fitting 1/8 0 4 22.50 26 32 35.50 67.50 73.50 10.25 1.70 20 Drawing No. CN0359-09-007 88 Customer Dr. K 92 100 Up Electrometer PART NO. 1 NTITY UNIT SCALE UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 95 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 20 41.50 E Fittin 35 M88 x 1 E 41.50 5 35 0 31.50 5 0 APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Brass

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S พมิ พล์ าย 20 ng 1/8 3.50 80 95 Note 1.O-Ring 2 x 88 x 92 = 1 Pcs. Drawing No. CN0359-09-008 PART NO. Customer Dr. K Up Electrometer 2 NTITY UNIT SCALE UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium 18 2 x 2.50 7.50 dimention Grade M3x0.5 - 6H 6 4 x 2.50 X<10 +- 0.1 33.76 33.76 M3x0.5 - 6H 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 Top 33.76 33.76 0,0 23 33.76 33.76 33.76 33.76 F Front 10 F 3 x 3.30 7.10 100 M4x0.7 - 6H 7 P.C.D. 75 Bottom 37.50 0,0 18.75 18.75 APPROVED CHECKED DRAWING 32.48 32.48 PART NAME PROJECTION Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Brass

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S B 14/10/16 Update 5 5 20° 5 6 Drawing No. CN0359-09-009 PART NO. Customer Dr. K Up Electrometer 3 NTITY UNIT SCALE UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium 4 x 2.50 THRU dimention Grade M3x0.5 X<10 +- 0.1 P.C.D. 60 10<X<30 +- 0.2 30<X<60 +- 0.3 64 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 3 7 7 0 G 4.07 11.07 4.0 15.07 5.1 16.07 5.6 7.0 G 11.0 15.0 16.0 APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 64 13.90 M53 x 1 51 48 +0.10 43.50 0 41.50 0 07 10 60 07 07 12.75 07 07 23 Drawing No. CN0359-09-010 PART NO. Customer Dr. K Up Electrometer 4 NTITY UNIT SCALE UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance 50 (Machining Process) 46 Division of Medium 1.70 64 dimention Grade 23.3370 21.9290° X<10 +- 0.1 19.92 10<X<30 +- 0.2 18.92 16.92 30<X<60 +- 0.3 15.92 60<X<100 +- 0.5 13.92 100<X<250 +- 0.8 Note 1.O-R 250<X +- 1 4 x 1.60 11.20 M2x0.4 - 6H 10 45° J J 10.20 THRU P.C.D. 60 23 1 64 10.20 THRU 70 M12x1.75 - 6H THRU APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Teflon 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S e Ring 2 x 46 x 50 = 1 Pcs. 12.92 10.92 9.92 7.92 6.92 4.92 3.50 0 P.C.D. 35 70 +0.02 2x 2 0 7 8 20 PART NO. Drawing No. CN0359-09-011 Customer Dr. K 5 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 21.50 10<X<30 +- 0.2 18 30<X<60 +- 0.3 0 60<X<100 +- 0.5 100<X<250 +- 0.8 Note 1.O-R 250<X +- 1 2 19 21.50 1821 16 14+0.10 13 1125 0 10 70 64 KK 20 10.20 THRU M12x1.75 - 6H THRU APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Teflon 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S e Ring 1 x 19 x 21 = 1 Pcs. 8 7 5 4 2 0 P.C.D. 46 25 2 4 x 2.50 6.50 M3x0.5 - 6H 5 PART NO. Drawing No. CN0359-09-012 Customer Dr. K 6 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 L 56 52 42 L APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 42 M53 x 1 56 11 8 4 0 PART NO. Drawing No. CN0359-09-013 Customer Dr. K 7 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 3 47 44.60 APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 3 PART NO. Drawing No. CN0359-09-014 Customer Dr. K 8 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 44.40 M 2.80 38.40 M 0.50 X 45° APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 38.40 44.40 PART NO. Drawing No. CN0359-09-015 Customer Dr. K 9 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 N 3.20 0 25 -0.10 N APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 2 3.20 0 25 -0.10 PART NO. Drawing No. CN0359-09-016 Customer Dr. K 10 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 O 45° 47 5 38.40 35.40 O APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 0 0.50 1 90° PART NO. Drawing No. CN0359-09-017 Customer Dr. K 11 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 43.50 5 APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 1 Drawing No. CN0359-09-018 PART NO. Customer Dr. K Up Electrometer 12 NTITY UNIT SCALE UNIQUE PRECISION Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 47 P 0.50 P 8 16 32 APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S 1 P.C.D. 26 P.C.D. 17 P.C.D. 8 Drawing No. CN0359-09-019 PART NO. Customer Dr. K Up Electrometer 13 NTITY UNIT SCALE UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 10<X<30 +- 0.2 30<X<60 +- 0.3 60<X<100 +- 0.5 100<X<250 +- 0.8 250<X +- 1 43.50 APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN SUS 304 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S Drawing No. CN0359-09-020 PART NO. Customer Dr. K Up Electrometer 14 NTITY UNIT SCALE UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196

Commercial Tolerance (Machining Process) Division of Medium dimention Grade X<10 +- 0.1 5 10<X<30 +- 0.2 0 4 30<X<60 +- 0.3 22 60<X<100 +- 0.5 26 100<X<250 +- 0.8 250<X +- 1 0 5 10 2 x 3.50 THRU 6 3.50 26 13 R3 APPROVED CHECKED DRAWING PROJECTION PART NAME Faraday U Wittaya.S Wittaya.S Somchay SURFACE MATERAIL QUAN Brass 1

Rev. Date Contens Approved A 06/09/59 NEW Wittaya.S PART NO. Drawing No. CN0359-09-021 Customer Dr. K 15 Up Electrometer SCALE NTITY UNIT UNIQUE PRECISION 1 Pcs. mm. 168 M.6 T.PASAK A.MUANG LAMPHUN 51000 Tel. 053-597195-6, Fax. 053-597196