Ralston Instruments

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.

The Ralston Digital Catalog

Shop Top Products from the Pressure Professionals!

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  1. Ralston Instruments QTHA-KIT4
    Ralston Instruments QTHA-KIT4 Universal Quick-test Hose and Adapter Kit
    Order #: QTHA-KIT4
    Mfg #: QTHA-KIT4
    Availability: In stock
    Special Price $1,076.07 Regular Price $1,144.76
    Universal Quick-test Hose and Adapter Kit Learn More
  2. Ralston Instruments NPAK-2FBA-6-3
    Ralston Instruments NPAK-2FBA-6-3 Nitrogen Calibration Source
    Order #: NPAK-2FBA-6-3
    Mfg #: NPAK-2FBA-6-3
    Availability: In stock
    Special Price $4,818.11 Regular Price $4,967.13
    Nitrogen Calibration Source Learn More
  3. Ralston Instruments DPPV-0000: Low Pressure and Vacuum Test Pump
    Ralston Instruments DPPV Low Pressure and Vacuum Test Pump
    Order #: DPPV-0000
    Mfg #: DPPV-0000
    Availability: In stock
    Special Price $515.77 Regular Price $531.73
    Low Pressure and Vacuum Test Pump Learn More
  4. Ralston QTHA-KIT4-SS Kit with 20 SS Adapters
    Ralston Instruments QTHA Universal Quick-test Hose and Adapter Kit
    Order #: QTHA-KIT4-SS
    Mfg #: QTHA-KIT4-SS
    Availability: In stock
    Special Price $1,509.90 Regular Price $1,556.60
    Universal Quick-test Hose and Adapter Kit Learn More
  5. Ralston Instruments DP0V-0000
    Ralston Instruments DP0V DP0V(100PSI/7bar)Pump,No Gauge Adapter,3ft.Hose,1/4"NPTM
    Order #: DP0V-0000
    Mfg #: DP0V-0000
    Availability: In stock
    Special Price $379.00 Regular Price $390.73
    DP0V(100PSI/7bar)Pump,No Gauge Adapter,3ft.Hose,1/4"NPTM Learn More
  6. Ralston Instruments QTFT-2MB0
    Ralston Instruments QTFT-2MB0 1/4"Male NPTxMale Quick-test no Check-valve w/Cap&Chain,Brass
    Order #: QTFT-2MB0
    Mfg #: QTFT-2MB0
    Availability: In stock
    Special Price $20.53 Regular Price $21.17
    1/4"Male NPTxMale Quick-test no Check-valve w/Cap&Chain,Brass Learn More
  7. Ralston Instruments QTCM-2MBA-20-2
    Ralston Instruments QTCM-2MBA-20-2 QTCM Manifold,1/4"MNPT Gauge Adapter,20ft,2ft Hoses,NylonBag
    Order #: QTCM-2MBA-20-2
    Mfg #: QTCM-2MBA-20-2
    Availability: In stock
    Special Price $566.87 Regular Price $584.41
    QTCM Manifold,1/4"MNPT Gauge Adapter,20ft,2ft Hoses,NylonBag Learn More
  8. Ralston Instruments DPPV-2FBA
    Ralston Instruments DPPV-2FBA Low Pressure and Vacuum Test Pump
    Order #: DPPV-2FBA
    Mfg #: DPPV-2FBA
    Availability: In stock
    Special Price $533.59 Regular Price $550.10
    Low Pressure and Vacuum Test Pump Learn More
  9. Ralston DCAP-2FSA Pneumatic Hand Pump
    Ralston Instruments DCAP-2FSA Pneumatic Hand Pump, 650 psi, 1/4" FNPT gauge conn., 3ft hose
    Order #: DCAP-2FSA
    Mfg #: DCAP-2FSA
    Availability: In stock
    Special Price $793.24 Regular Price $817.78
    Pneumatic Hand Pump, 650 psi, 1/4" FNPT gauge conn., 3ft hose Learn More
  10. Ralston Instruments DPPV-2MBA
    Ralston Instruments DPPV-2MBA DPPV(+125PSI to -23inHg)Pump 1/4"NPTM Gauge Adapter,3ft.Hose
    Order #: DPPV-2MBA
    Mfg #: DPPV-2MBA
    Availability: In stock
    Special Price $534.81 Regular Price $551.36
    DPPV(+125PSI to -23inHg)Pump 1/4"NPTM Gauge Adapter,3ft.Hose Learn More
  11. Ralston Instruments QTQT-HOS-100FT
    Ralston Instruments QTQT-HOS-100FT Quick-test 6900PSI Hose,Brass Hose Ends,100ft(30.1m)long
    Order #: QTQT-HOS-100FT
    Mfg #: QTQT-HOS-100FT
    Availability: In stock
    Special Price $552.90 Regular Price $570.00
    Quick-test 6900PSI Hose,Brass Hose Ends,100ft(30.1m)long Learn More
  12. Ralston Instruments NPAK-1MBA-6-3
    Ralston Instruments NPAK-1MBA-6-3 Nitrogen Calibration Source
    Order #: NPAK-1MBA-6-3
    Mfg #: NPAK-1MBA-6-3
    Availability: In stock
    Special Price $4,816.25 Regular Price $4,965.21
    Nitrogen Calibration Source Learn More
  13. Ralston Instruments QTCM
    Ralston Instruments QTCM Nitrogen Calibration Manifold
    Order #: QTCM-0000-0-0
    Mfg #: QTCM-0000-0-0
    Availability: In stock
    Special Price $324.95 Regular Price $335.00
    Nitrogen Calibration Manifold Learn More
  14. Ralston Instruments QTHA-FRS0
    Ralston Instruments QTHA-FRS0 5/16"-24UNF x Male Quick-test,no Check-valve,SS
    Order #: QTHA-FRS0
    Mfg #: QTHA-FRS0
    Availability: In stock
    Special Price $41.57 Regular Price $42.86
    5/16"-24UNF x Male Quick-test,no Check-valve,SS Learn More
  15. Ralston Instruments DP0V-2MBA DP0V 100PSI Pump
    Ralston Instruments DP0V-2MBA DP0V(100PSI/7bar)Pump,1/4"NPTM Gauge Adapter,3ft.Hose
    Order #: DP0V-2MBA
    Mfg #: DP0V-2MBA
    Availability: In stock
    Special Price $398.04 Regular Price $410.36
    DP0V(100PSI/7bar)Pump,1/4"NPTM Gauge Adapter,3ft.Hose Learn More
  16. Ralston Instruments QTQT-HOS-50FT
    Ralston Instruments QTQT-HOS-50FT Quick-test 6900PSI Hose,Brass Hose Ends,50ft(15.2m)long
    Order #: QTQT-HOS-50FT
    Mfg #: QTQT-HOS-50FT
    Availability: In stock
    Special Price $295.85 Regular Price $305.00
    Quick-test 6900PSI Hose,Brass Hose Ends,50ft(15.2m)long Learn More
  17. Transcat QTHA-KIT6-6FT
    Ralston Instruments QTHA-KIT6-6FT High Pressure Hose Kit,6000PSI Brass,6'
    Order #: QTHA-KIT6-6FT
    Mfg #: QTHA-KIT6-6FT
    Availability: In stock
    Special Price $181.95 Regular Price $187.58
    High Pressure Hose Kit,6000PSI Brass,6' Learn More
  18. Ralston Instruments QTHA-2MB0
    Ralston Instruments QTHA-2MB0 1/4"Male NPT x Quick-test no Check-valve,Brass
    Order #: QTHA-2MB0
    Mfg #: QTHA-2MB0
    Availability: In stock
    Special Price $10.50 Regular Price $10.83
    1/4"Male NPT x Quick-test no Check-valve,Brass Learn More
  19. Ralston Instruments QTHA-2TB0
    Ralston Instruments QTHA-2TB0 1/4" Tube Adapter for Quick-Test Hose,Brass
    Order #: QTHA-2TB0
    Mfg #: QTHA-2TB0
    Availability: In stock
    Special Price $14.86 Regular Price $15.32
    1/4" Tube Adapter for Quick-Test Hose,Brass Learn More
  20. Ralston Instruments QTFT-2MB1
    Ralston Instruments QTFT-2MB1 NPT Male 1/4''
    Order #: QTFT-2MB1
    Mfg #: QTFT-2MB1
    Availability: In stock
    Special Price $26.53 Regular Price $27.36
    NPT Male 1/4'' Learn More
  21. Ralston Instruments QTHA-KIT6-3FT
    Ralston Instruments QTHA-KIT6-3FT Quick-test Hose Kit
    Order #: QTHA-KIT6-3FT
    Mfg #: QTHA-KIT6-3FT
    Availability: In stock
    Special Price $152.27 Regular Price $156.98
    Quick-test Hose Kit Learn More
  22. Ralston Instruments NPAK-0000-0-0
    Ralston Instruments NPAK-0000-0-0 NPAK,No Hoses,Adapters Pressure Calibration Kit
    Order #: NPAK-0000
    Mfg #: NPAK-0000-0-0
    Availability: In stock
    Special Price $4,656.00 Regular Price $4,800.00
    NPAK,No Hoses,Adapters Pressure Calibration Kit Learn More
  23. Ralston Instruments QTQT-HOS-20FT
    Ralston Instruments QTQT-HOS-20FT Quick-test 6900PSI Hose,Brass Hose Ends,20ft(6.10m)long
    Order #: QTQT-HOS-20FT
    Mfg #: QTQT-HOS-20FT
    Availability: In stock
    Special Price $141.62 Regular Price $146.00
    Quick-test 6900PSI Hose,Brass Hose Ends,20ft(6.10m)long Learn More
  24. Ralston Instruments DP0V-2FBA
    Ralston Instruments DP0V-2FBA DP0V(100 psi/7bar)pump,1/4" F NPT adapter,3ft hose,1/4MNPT
    Order #: DP0V-2FBA
    Mfg #: DP0V-2FBA
    Availability: In stock
    Special Price $396.82 Regular Price $409.10
    DP0V(100 psi/7bar)pump,1/4" F NPT adapter,3ft hose,1/4MNPT Learn More
  25. Ralston Instruments QTHA-HSTE
    Ralston Instruments QTHA-HSTE Hose Tee,MALE QTrunxMALE QTRunx MALE QT Branch, Brass
    Order #: QTHA-HSTE
    Mfg #: QTHA-HSTE
    Availability: In stock
    Special Price $58.51 Regular Price $60.32
    Hose Tee,MALE QTrunxMALE QTRunx MALE QT Branch, Brass Learn More
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