Ralston Instruments

Ralston Instruments (RI) engineers reliable equipment and systems for precise pressure calibration, and Since 1969, has continued its heritage as a family-owned company with an inventive spirit. This spirit led to the development of the industry’s first pneumatic and hydraulic hand pumps. Ralston also launched the first fully integrated system of RI hoses and adapters designed for low volume, high pressure connection to tested devices. Ralston delivers extreme precision during a range of industrial applications, with all products made in the USA .These products save businesses valuable time during critical pressure testing and maintenance. The company’s pressure sources are pinnacle products used for differential or static pressure calibrations. Transcat proudly distributes an outstanding selection of Ralston components for the calibration of pressure instruments.
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  1. Ralston Instruments FLP1-GP-2M
    Ralston Instruments FLP1-GP-2M FieldLab Pressure Calibrator IS,1000PSI/70bar/7MPa
    Order #: FLP1-GP-2M
    Mfg #: FLP1-GP-2M
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $1,842.03 Regular Price $1,899.00
    FieldLab Pressure Calibrator IS,1000PSI/70bar/7MPa Learn More
  2. Ralston Instruments MM-QTHA-0036-SS
    Ralston Instruments MM-QTHA-0036-SS Bushing
    Order #: MM-QTHA-0036-SS
    Mfg #: MM-QTHA-0036-SS
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $2.42 Regular Price $2.50
    Bushing Learn More
  3. Ralston Instruments QTHA-3MS0-AN-QD 3/8" female 37 degree flare (H06 AN/JIC) x male Quick-test, S.S.
    Ralston Instruments QTHA-3MS0-AN-QD 3/8"F 37deg.Flare(H06 AN/JIC)x Male Quick-test,SS
    Order #: QTHA-3MS0-AN-QD
    Mfg #: QTHA-3MS0-AN-QD
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $46.56 Regular Price $48.00
    3/8"F 37deg.Flare(H06 AN/JIC)x Male Quick-test,SS Learn More
  4. Ralston Instruments QTHA-2MS0-AN-QD 1/4" male 37 degree flare x male Quick-test
    Ralston Instruments QTHA-2MS0-AN-QD 1/4"Male 37 deg.Flare(H04 AN/ JIC)x Male Quick-test,SS
    Order #: QTHA-2MS0-AN-QD
    Mfg #: QTHA-2MS0-AN-QD
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $35.98 Regular Price $37.10
    1/4"Male 37 deg.Flare(H04 AN/ JIC)x Male Quick-test,SS Learn More
  5. Ralston Instruments SO2006-BN
    Ralston Instruments SO2006-BN O-Ring
    Order #: SO2006-BN
    Mfg #: SO2006-BN
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $0.36 Regular Price $0.38
    O-Ring Learn More
  6. Ralston Instruments 2L2L-HOS-2FT
    Ralston Instruments 2L2L-HOS-2FT Quick Connect Test Hose,2ft. w/Female 37 Degree Flare Ends
    Order #: 2L2L-HOS-2FT
    Mfg #: 2L2L-HOS-2FT
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $177.12 Regular Price $182.60
    Quick Connect Test Hose,2ft. w/Female 37 Degree Flare Ends Learn More
  7. Ralston Instruments QSQS-HOS-12FT Quick-test 6900PSI Hose, 12ft
    Ralston Instruments QSQS-HOS-12FT Quick-test 6900PSI Hose,SS Hose Ends,12ft.long
    Order #: QSQS-HOS-12FT
    Mfg #: QSQS-HOS-12FT
    Availability: Item ships in about Call for availability
    Special Price $123.57 Regular Price $127.40
    Quick-test 6900PSI Hose,SS Hose Ends,12ft.long Learn More
  8. Ralston Instruments XTXT-HOS-0.5M
    Ralston Instruments XTXT-HOS-0.5M Quick-Test XT 10K PSI hose, SS hose ends
    Order #: XTXT-HOS-0.5M
    Mfg #: XTXT-HOS-0.5M
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $116.85 Regular Price $196.59
    Quick-Test XT 10K PSI hose, SS hose ends Learn More
  9. Ralston GAUD-140INH2O
    Ralston Instruments GAUD-140INH2O Digital Gauge,0-140"H2O
    Order #: GAUD-140INH2O
    Mfg #: GAUD-140INH2O
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $347.26 Regular Price $358.00
    Digital Gauge,0-140"H2O Learn More
  10. Ralston Instruments SKT4-HPGV
    Ralston Instruments SKT4-HPGV Calibrator Type Pressure(HPGV) 1000/2000PSIG Digital Gauges
    Order #: SKT4-HPGV
    Mfg #: SKT4-HPGV
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $1,632.60 Regular Price $1,683.10
    Calibrator Type Pressure(HPGV) 1000/2000PSIG Digital Gauges Learn More
  11. Ralston Instruments  QTHA-4FSO-QD
    Ralston Instruments QTHA-4FSO-QD 1/2"NPTF Quick-connect x Quick- test Male,No Check-valve,SS
    Order #: QTHA-4FSO-QD
    Mfg #: QTHA-4FSO-QD
    Availability: Item discontinued
    $70.00
    View details
    1/2"NPTF Quick-connect x Quick- test Male,No Check-valve,SS Learn More
  12. Ralston Instruments APGO200I+QTFIT
    Ralston Instruments APGO200I+QTFIT Pressure Calibrator,0-200"H2O +/-2% FS Mech.
    Order #: APGO200I+QTFIT
    Mfg #: APGO200I+QTFIT
    Availability: Item discontinued
    $409.15
    View details
    Pressure Calibrator,0-200"H2O +/-2% FS Mech. Learn More
  13. Ralston Instruments XREG-3KPSIG
    Ralston Instruments XREG-3KPSIG Pneumatic Pressure Regulator(3K PSI/210bar)Output,1/4"NPTF Port
    Order #: XREG-3KPSIG
    Mfg #: XREG-3KPSIG
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $429.71 Regular Price $443.00
    Pneumatic Pressure Regulator(3K PSI/210bar)Output,1/4"NPTF Port Learn More
  14. Ralston Instruments SP0V-0012
    Ralston Instruments SP0V-0012 SP0V Sampling Pump Replacement Body,Hard Coated Aluminum
    Order #: SP0V-0012
    Mfg #: SP0V-0012
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $128.04 Regular Price $132.00
    SP0V Sampling Pump Replacement Body,Hard Coated Aluminum Learn More
  15. Ralston Instruments SP0V-0006
    Ralston Instruments SP0V-0006 SP0V Sampling Pump Outlet Check Valve,SS
    Order #: SP0V-0006
    Mfg #: SP0V-0006
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $22.40 Regular Price $23.10
    SP0V Sampling Pump Outlet Check Valve,SS Learn More
  16. Ralston Instruments SP0V-0005
    Ralston Instruments SP0V-0005 SP0V Sampling Pump Pumping Piston
    Order #: SP0V-0005
    Mfg #: SP0V-0005
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $61.11 Regular Price $63.00
    SP0V Sampling Pump Pumping Piston Learn More
  17. Ralston Instruments QTVC-4FBA-RG-2M-1M
    Ralston Instruments QTVC-4FBA-RG-2M-1M QTVC Volume Controller,1/2"F BSPP Gauge Adapter,2m,1m Hoses
    Order #: QTVC-4FBA-RG-2M-1M
    Mfg #: QTVC-4FBA-RG-2M-1M
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $1,656.23 Regular Price $1,707.46
    QTVC Volume Controller,1/2"F BSPP Gauge Adapter,2m,1m Hoses Learn More
  18. Ralston Instruments QTVC-3FBA-RG-2M-1M
    Ralston Instruments QTVC-3FBA-RG-2M-1M QTVC Volume Controller,3/8"F BSPP Gauge Adapter,2m,1m Hoses
    Order #: QTVC-3FBA-RG-2M-1M
    Mfg #: QTVC-3FBA-RG-2M-1M
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $1,653.32 Regular Price $1,704.46
    QTVC Volume Controller,3/8"F BSPP Gauge Adapter,2m,1m Hoses Learn More
  19. Ralston Instruments QTVC-2FBA-6-3
    Ralston Instruments QTVC-2FBA-6-3 QTVC Volume Controller,1/4"FNPT Gauge Adapter,6ft,3ft.Hoses
    Order #: QTVC-2FBA-6-3
    Mfg #: QTVC-2FBA-6-3
    Availability: Item ships in about Call for availability
    Special Price $1,616.56 Regular Price $1,666.56
    QTVC Volume Controller,1/4"FNPT Gauge Adapter,6ft,3ft.Hoses Learn More
  20. Ralston Instruments QTVC-2FBA-RG-2M-1M
    Ralston Instruments QTVC-2FBA-RG-2M-1M QTVC Volume Controller,1/4"F BSPP Gauge Adapter,2m,1m Hoses
    Order #: QTVC-2FBA-RG-2M-1M
    Mfg #: QTVC-2FBA-RG-2M-1M
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $1,651.58 Regular Price $1,702.66
    QTVC Volume Controller,1/4"F BSPP Gauge Adapter,2m,1m Hoses Learn More
  21. Ralston Instruments QTVC-0024
    Ralston Instruments QTVC-0024 QTVC Front Panel
    Order #: QTVC-0024
    Mfg #: QTVC-0024
    Availability: Item ships in about 4 - 6 Weeks
    Special Price $79.54 Regular Price $82.00
    QTVC Front Panel Learn More
  22. Ralston Instruments QTVC-0020
    Ralston Instruments QTVC-0020 QTVC Top Portion of Fine Adjust Assembly w/o Piston
    Order #: QTVC-0020
    Mfg #: QTVC-0020
    Availability: In stock
    Special Price $186.24 Regular Price $192.00
    QTVC Top Portion of Fine Adjust Assembly w/o Piston Learn More
  23. Ralston Instruments QTVC-0018
    Ralston Instruments QTVC-0018 QTVC Fine Adjust Piston only
    Order #: QTVC-0018
    Mfg #: QTVC-0018
    Availability: In stock
    Special Price $56.26 Regular Price $58.00
    QTVC Fine Adjust Piston only Learn More
  24. Ralston Instruments QTVC-0014
    Ralston Instruments QTVC-0014 QTVC Body,Bottom Plate
    Order #: QTVC-0014
    Mfg #: QTVC-0014
    Availability: In stock
    Special Price $386.06 Regular Price $398.00
    QTVC Body,Bottom Plate Learn More
  25. Ralston Instruments QTVC-0010
    Ralston Instruments QTVC-0010 QTVC Bleed Valve Assembly
    Order #: QTVC-0010
    Mfg #: QTVC-0010
    Availability: In stock
    Special Price $143.56 Regular Price $148.00
    QTVC Bleed Valve Assembly Learn More
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