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 QTHP-1KPSIG-D Hydraulic Hand Pump & 1KPSI Pressure Gauge
    Ralston Instruments QTHP-1KPSIG-D Hydraulc.Hand Pump,5K PSI/35mPa Digital Pressure Gauge,1KPSI
    Order #: QTHP-1KPSIG-D
    Mfg #: QTHP-1KPSIG-D
    Availability: Ships in 2-3 weeks
    Special Price $992.61 Regular Price $1,023.31
    Hydraulc.Hand Pump,5K PSI/35mPa Digital Pressure Gauge,1KPSI Learn More
  2. New
    Ralston Instruments QTVC-EN-KIT1-6-3 ControlPak Pres Contlr,1/8MNPT, 1/4MNPT,1/4FNPT, 6&3ft hoses
    Ralston Instruments QTVC-EN-KIT1-6-3 ControlPak Press.Cntrlr.6ft/3ft Hses,1/8"NPTM,1/4"NPTM,1/4"NPT
    Order #: QTVC-EN-KIT1-6-3
    Mfg #: QTVC-EN-KIT1-6-3
    Availability: Ships in 2-3 weeks
    $2,051.36
    ControlPak Press.Cntrlr.6ft/3ft Hses,1/8"NPTM,1/4"NPTM,1/4"NPT Learn More
  3. New
    Ralston Instruments QTVC-EN-0000-0-0 ControlPak Pres Contlr,no gauge adapt,hose, or process conn
    Ralston Instruments QTVC-EN-0000-0-0 ControlPak Press.Controller,No Gauge,Adapt.,Hose or Proc.Conn.
    Order #: QTVC-EN-0000-0-0
    Mfg #: QTVC-EN-0000-0-0
    Availability: Ships in 2-3 weeks
    $1,859.23
    ControlPak Press.Controller,No Gauge,Adapt.,Hose or Proc.Conn. Learn More
  4. New
    Ralston Instruments QTHP-3KPSIG-D 5K PSI/35mPa Hydraulic Hand Pump,3K PSI Digital Gauge
    Ralston Instruments QTHP-3KPSIG-D 5K PSI/35mPa Hydraulic Hand Pump,3K PSI Digital Gauge
    Order #: QTHP-3KPSIG-D
    Mfg #: QTHP-3KPSIG-D
    Availability: In stock
    Special Price $961.91 Regular Price $1,023.31
    5K PSI/35mPa Hydraulic Hand Pump,3K PSI Digital Gauge Learn More
  5. New
    Ralston Instruments QTHA-MTB0-12MM 12mm Tube Fitting x Male Quick- Test,No Check-Valve,Brass
    Ralston Instruments QTHA-MTB0-12MM 12mm Tube Fitting x Male Quick- Test,No Check-Valve,Brass
    Order #: QTHA-MTB0-12MM
    Mfg #: QTHA-MTB0-12MM
    Availability: In stock
    $55.64
    12mm Tube Fitting x Male Quick- Test,No Check-Valve,Brass Learn More
  6. New
    Ralston Instruments QTHP-4FBA-RG Hydraulic Hand Pump,5kPSI/35MPa
    Ralston Instruments QTHP-4FBA-RG Hydraulic Hand Pump,5kPSI/35MPa
    Order #: QTHP-4FBA-RG
    Mfg #: QTHP-4FBA-RG
    Availability: In stock
    Special Price $616.11 Regular Price $635.17
    Hydraulic Hand Pump,5kPSI/35MPa Learn More
  7. New
    Ralston Instruments QT2S-HOS-6FT Quick-test Hose,1 Brass hose 1 1/4 tube stube end 6' long
    Ralston Instruments QT2S Quick-test Hose,1 Brass hose 1 1/4 tube stube end 6' long
    Order #: QT2S-HOS-6FT
    Mfg #: QT2S-HOS-6FT
    Availability: Ships in 2-3 weeks
    Special Price $81.81 Regular Price $84.35
    Quick-test Hose,1 Brass hose 1 1/4 tube stube end 6' long Learn More
  8. New
    Ralston Instruments LC10-TA12 Temperature Gauge, Probe, 1/4" diameter,12",bottom connection
    Ralston Instruments LC10-TA12 Temperature Gauge, Probe, 1/4" diameter,12",bottom connection
    Order #: LC10-TA12
    Mfg #: LC10-TA12
    Availability: Ships in 2-3 weeks
    Special Price $435.53 Regular Price $449.00
    Temperature Gauge, Probe, 1/4" diameter,12",bottom connection Learn More
  9. Ralston Instruments NPAK-2FBA-6-3 for Rent Nitropak Nitrogen Pressure Source, 3K PSI, 1/4"NPT
    Ralston Instruments NPAK-2FBA-6-3 for Rent Nitropak Nitrogen Pressure Source, 3K PSI, 1/4"NPT
    Order #: NPAK-2FBA-6-3-RENT1
    Mfg #: $43002FBA-6-3-RENT1
    Availability: In stock
    Call for price
    Nitropak Nitrogen Pressure Source, 3K PSI, 1/4"NPT Learn More
  10. New
    Ralston DCAP-PV-1MSA Vacuum Pressure Pump
    Ralston Instruments DCAP-PV Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/8"NPTM,3'Hose
    Order #: DCAP-PV-1MSA
    Mfg #: DCAP-PV-1MSA
    Availability: Ships in 2-3 weeks
    Special Price $833.38 Regular Price $886.58
    Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/8"NPTM,3'Hose Learn More
  11. New
    Ralston DCAP-PV-2MSA Vacuum Pressure Pump
    Ralston Instruments DCAP-PV Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/4"NPTM,3'Hose
    Order #: DCAP-PV-2MSA
    Mfg #: DCAP-PV-2MSA
    Availability: In stock
    Special Price $864.10 Regular Price $890.83
    Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/4"NPTM,3'Hose Learn More
  12. New
    Ralston DCAP-PV-2FSA Vacuum Pressure Pump
    Ralston Instruments DCAP-PV Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/4"NPTF,3'Hose
    Order #: DCAP-PV-2FSA
    Mfg #: DCAP-PV-2FSA
    Availability: Ships in 2-3 weeks
    Special Price $836.05 Regular Price $889.42
    Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/4"NPTF,3'Hose Learn More
  13. New
    Ralston DCAP-PV-0000 Vacuum Pressure Pump
    Ralston Instruments DCAP-PV Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/4"NPTM,3'Hose
    Order #: DCAP-PV-0000
    Mfg #: DCAP-PV-0000
    Availability: In stock
    Special Price $796.66 Regular Price $847.52
    Vacuum Pressure Pump,650PSI(4.5 mPa)28.5"HgVac,1/4"NPTM,3'Hose Learn More
  14. New
    Ralston LC10-GT2M Digital Pressure Gauge
    Ralston Instruments LC10 Pressure Gauge,5K PSI/350bar/35 mPa,1/4"NPTM,Bottom
    Order #: LC10-GT2M
    Mfg #: LC10-GT2M
    Availability: Ships in 2-3 weeks
    Special Price $393.86 Regular Price $419.00
    Pressure Gauge,5K PSI/350bar/35 mPa,1/4"NPTM,Bottom Learn More
  15. New
    Ralston LC10-GP2M Digital Pressure Gauge
    Ralston Instruments LC10-GP2M Pressure Gauge,1K PSI/70bar/ 7mPa,1/4"NPTM,Bottom
    Order #: LC10-GP2M
    Mfg #: LC10-GP2M
    Availability: In stock
    Special Price $393.86 Regular Price $419.00
    Pressure Gauge,1K PSI/70bar/ 7mPa,1/4"NPTM,Bottom Learn More
  16. New
    Ralston LC10-GJ2M Digital Pressure Gauge
    Ralston Instruments LC10 Pressure Gauge,100PSI/7br/700 kPa,1/4"NPTM,Bottom
    Order #: LC10-GJ2M
    Mfg #: LC10-GJ2M
    Availability: Ships in 2-3 weeks
    Special Price $375.06 Regular Price $399.00
    Pressure Gauge,100PSI/7br/700 kPa,1/4"NPTM,Bottom Learn More
  17. New
    Ralston LC10-GD2M Digital Pressure Gauge
    Ralston Instruments LC10 Pressure Gauge,15PSI/1br/100kPa 1/4"NPTM,Bottom
    Order #: LC10-GD2M
    Mfg #: LC10-GD2M
    Availability: Ships in 2-3 weeks
    Special Price $375.06 Regular Price $399.00
    Pressure Gauge,15PSI/1br/100kPa 1/4"NPTM,Bottom Learn More
  18. New
    Ralston LC10-GC2M Digital Pressure Gauge
    Ralston Instruments LC10 Pressure Gauge,+/-15PSI/1bar/ 100kPa,1/4"NPTM,Bottom
    Order #: LC10-GC2M
    Mfg #: LC10-GC2M
    Availability: Ships in 2-3 weeks
    Special Price $375.06 Regular Price $399.00
    Pressure Gauge,+/-15PSI/1bar/ 100kPa,1/4"NPTM,Bottom Learn More
  19. New
    Ralston XTHP-0000 10,000 psi Hydraulic Hand Pump
    Ralston Instruments XTHP-0000 10,000 psi Hydraulic Hand Pump No Gauge Connect
    Order #: XTHP-0000
    Mfg #: XTHP-0000
    Availability: Ships in 2-3 weeks
    Special Price $982.30 Regular Price $1,045.00
    10,000 psi Hydraulic Hand Pump No Gauge Connect Learn More
  20. New
    Ralston XTHP-2MSA 10,000 psi Hydraulic Hand Pump
    Ralston Instruments XTHP-2MSA Hydraulic Hand Pump,10,000PSI 1/4"NPTM,SS
    Order #: XTHP-2MSA
    Mfg #: XTHP-2MSA
    Availability: In stock
    Special Price $1,057.24 Regular Price $1,089.94
    Hydraulic Hand Pump,10,000PSI 1/4"NPTM,SS Learn More
  21. New
    Ralston XTHP-2FSA 10,000 psi Hydraulic Hand Pump
    Ralston Instruments XTHP-2FSA 10,000PSI Hydraulic Hand Pump 1/4" Female NPT, S.S.
    Order #: XTHP-2FSA
    Mfg #: XTHP-2FSA
    Availability: In stock
    Special Price $1,061.28 Regular Price $1,094.11
    10,000PSI Hydraulic Hand Pump 1/4" Female NPT, S.S. Learn More
  22. New
    Ralston XTHP-10KPSIG-FL 10,000 psi Hydraulic Hand Pump
    Ralston Instruments XTHP-10KPSIG-FL 10,000 psi Hydraulic Hand Pump 10000 PSI FieldLab
    Order #: XTHP-10KPSIG-FL
    Mfg #: XTHP-10KPSIG-FL
    Availability: Ships in 2-3 weeks
    Special Price $2,861.36 Regular Price $3,044.00
    10,000 psi Hydraulic Hand Pump 10000 PSI FieldLab Learn More
  23. New
    Ralston XTHP-10KPSIG-D 10,000 psi Hydraulic Hand Pump
    Ralston Instruments XTHP-10KPSIG-D 10,000 psi Hydraulic Hand Pump 10000 PSI Dig Gauge
    Order #: XTHP-10KPSIG-D
    Mfg #: XTHP-10KPSIG-D
    Availability: Ships in 2-3 weeks
    Special Price $1,422.32 Regular Price $1,513.11
    10,000 psi Hydraulic Hand Pump 10000 PSI Dig Gauge Learn More
  24. New
    Ralston XTHP-1MSA 10,000 psi Hydrualic Hand Pump
    Ralston Instruments XTHP-1MSA 10,000 psi Hydraulic Hand Pump 1/8" Male NPT, S.S.
    Order #: XTHP-1MSA
    Mfg #: XTHP-1MSA
    Availability: Ships in 2-3 weeks
    Special Price $1,028.76 Regular Price $1,094.43
    10,000 psi Hydraulic Hand Pump 1/8" Male NPT, S.S. Learn More
  25. New
    Ralston LC10-GV2M Digital Pressure Gauge
    Ralston Instruments LC10-GV2M Digital Pressure Gauge 10,000 psi/70 Mpa
    Order #: LC10-GV2M
    Mfg #: LC10-GV2M
    Availability: Ships in 2-3 weeks
    Special Price $393.86 Regular Price $419.00
    Digital Pressure Gauge 10,000 psi/70 Mpa Learn More
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