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  • Pneumatic Scissor Hand Pump

    • High Pressure to 300 psi or 500 psi
    • Vacuum to 25" Hg., Minimum
    • True One Hand Operation of all Controls
    • Pressure-Balanced Vernier Adjustment
    • Rugged, Industrial Strength Construction
    • No Exposed Springs, Piston Rods

      COMBO·PUMP is a combined high pressure and vacuum calibration pump in one rugged, compact unit. The COMBO·PUMP features true one-hand operation! Push one button to convert from pressure to vacuum mode. A pressure balanced precision vernier knob allows easy fingertip "fine-tuning" of calibration pressure and vacuum to ± 0.01 psi over the full pressure and vacuum range. The standard COMBO·PUMP 300 range is 300 psi pressure and 25" Hg. (-12.3 psi) vacuum. Also available is the COMBO·PUMP 500 with a range of 500 psi pressure and 25" Hg. (-12.3 psi) vacuum.

      The COMBO·PUMP's unique single compound lever pump handle generates faster pressure or vacuum buildup with fewer strokes and much less operator fatigue than other pumps. COMBO·PUMP is made for years of no-maintenance service in demanding industrial environments. All moving parts of the pump mechanism are protected inside the pump handle from damage and dirt. No exposed springs, piston rods, etc. The body and handle are anodized, aircraft-grade aluminum and all moving parts are high strength, corrosion-proof plastics and metal.

      Small size and light weight make COMBO·PUMP the perfect choice for use with all portable pressure and vacuum field calibrators or test gauges. COMBO·PUMP can be ordered with an optional second output port to permit connection to two test devices. Factory installed, instrument-grade quick-connect fittings and 3 or 6 foot long quick-connect tubing kits are available accessories.

  • DCAP Pressure Test Pump Standard
  • APGV0000

    Ralston Instruments' Hand Pumps are rugged and portable. Field tested calibration solutions with standard Quick-Test adapters which make connecting to pressure references and the device being calibrated a snap.

  • SP0V-15PSIG-M
  • DV0V-0000
  • MECP500 pic

    Pressure Pump Features:

    • Ease of use
    • Fine adjust vernier
    • Fine release bleed valve
    • Vacuum to 600 psi
    • Kits available
    • Field Serviceable valves

    The Pressure Hand Pump is a compact, lightweight, portable hand-operated pressure and vacuum pump.  When a digital calibrator is added the unit can be used to calibrate or check pressure measuring devices in the field.  No external power or high pressure bottles are required.  The pressure pump is completely assembled and ready to connect to the pressure device to be calibrated.  Calibration is quick and simple since the pump is taken directly to the pressure device. This pressure pump provides a source of air pressure, 0-600 psi, or vacuum,  0-28" Hg. 

  • Combination Pressure/Vacuum Hand Pumps

    Pneumatic pressures to 1250 inH2O/45 psi
    Vacuum to -27 inHg
    Precise fine control to 0.01 inH2O
    Thermally insulated to eliminate temperature effects


    The PV210 is a lightweight yet rugged and durable low pressure and vacuum hand pump offering exceptional fine control. Thermally insulated to eliminate hand held temperature effects and supplied with a built-in pressure relief valve to protect the test instrument, this pump was truly designed with the requirements of low pressure calibrations in mind.

    • Dual source of pneumatic pressure and vacuum
    • Finger tight quick fit connectors
    • Extremely low pressures generated by using the fine adjust vernier alone
    • Built-in pressure relief valve for setting maximum output pressure
    • Fine control needle valve for pressure release

  • GE Druck PV211 Pneumatic Pressure and Vacuum Pumps

    Pressures to 600 psi
    Vacuum to 28.5 inHg
    High pneumatic pressure generation with minimal effort
    Precision vernier control


    The field proven PV211 is a lightweight yet high quality combined pressure and vacuum hand pump.
    The PV211 has been designed to provide maximum pneumatic pressures efficiently and effortlessly.

    • Dual source of pneumatic pressure and vacuum
    • Built-in fine adjust vernier
    • Needle valve provides controlled pressure release
    • Selector valve for vacuum or pressure generation
    • Comfortable, ergonomically designed molded handles
    • Adjustable stroke
    • Extremely efficient - only 4 strokes to 100 psi!