Starting at $5,477.00
  • Usually ships in 1-2 weeks



  • Comparison test pump for pressure instruments
  • Calibrate gauges, indicators, or transducers
  • 420ml reservoir capacity
  • 1.5ml fine adjust piston volume
  • Durable materials of construction
    • Stainless steel ram/adapters
    • Body of stainless steel, aluminum, & copper
    • Buna-N seals
  • 1-year warranty

What's in the Box

  • 20 o-rings
  • Manual


The Additel ADT 946A hydraulic calibration pump incorporates a dual-piston system which is ideal for filling large volume workload with the hand pump and providing smooth increase and decrease of pressure with the high pressure, fine adjust screw press.

An isolation valve isolates the calibration volume from the check valve associated with the hand pump. Because the check valve can often be a source of leaks and maintenance, the isolation valve provides more stable measurements and reduces potential maintenance of the pump. Three hand-tight quick connectors installed on the pump allow easy connecting and disconnecting to the test pump without the need for PTFE tape or wrenches.