Ametek - Test & Calibration Instruments

HK Pneumatic Deadweight Tester

The AMETEK HK Pneumatic Deadweight Tester is a primary standard used to calibrate pressure and differential pressure gauges, transmitters, transducers, recorders and controllers, which can provide a reference pressure in process control applications.

Self-regulating pressure standard
The AMETEK HK Pneumatic Deadweight Tester is a primary standard that produces a pressure by applying force (weight set) over area (the ceramic ball and nozzle). The HK tester is NIST traceable and accurate to ±0.015% using stainless steel weights calibrated to International standard gravity at 9.80665 m/s2 or local gravity as specified. The HK tester is self-regulating with accuracy independent of the operator. The tester utilizes a virtually frictionless ceramic ball floating on a layer of air within a stainless steel cylinder. The HK tester features a quick-leveling system for lab setup. The unit may also be mounted on an optional tripod for more convenient setup. Weights are located in foam-protective slots in the case.


  • Pressure Range
    50 to 10,000 kPa (10 to 1500 psi)
  • Accuracy
    to ±0.025% of Indicated reading
  • Repeateability
    ±0.005% of indicated reading
  • Available units
    psi, kg/cm2, bar, kPa
  • Special Calibrations/Local Gravity
    HK testers are supplied standard with masses calibrated to International Standard gravity of 9.80665 m/s2. Local gravity calibration is available on all models.
  • High Pressure Pneumatic Standard
    The HK is a high pressure pneumatic alternative to the available hydraulic standards. This series allows for selfregulating calibrations at high pressures without leaving a hydraulic residue in the UUT.
  • Exceptional Performance and Safety Built-In
    - Floating Ball Operation
    - Self-Regulating
    - Rugged Ceramic Measuring Ball
    - Overhung Weight Carrier
    - Non-Contaminating Test Fluid
    - Ball Valves for Inlet and Outlet
    - Interchangeable Weights
    - Prefill Supplied for Quick Filling
    - Large Static
    - Output Volumes
    - NIST Traceable


Model: HK
Type: Pneumatic, ball type
Pressure range: to 10,000 kPa / 1,500 psi
(model dependent)
Accuracy (12 months): to ±0.025% rdg
Repeatability: ±0.005% rdg
Temperatue coefficient: ±0.00167% of rdg/°C (@ 23°C)
Increments (low - min):. 1 psi, 0.1 kg/cm2,
0.1 bar, 5 kPa, 2 inHg
Gravity: 9.80665 m/s2 (international standard)
or Local gravity (specify when ordering)