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Primary Standards (Deadweight Testers)

Deadweight testers are superior to all digital systems. Use the deadweight testers as your company's primary standard or to calibrate very critical pressure gauges as in custody transfer applications.

Pneumatic Deadweight Testers

These self-regulating floating-ball testers offer a high level of accuracy independent of the operator and have earned their reputation as the 'standard of primary standards'. Pneumatic deadweight testers are available for pressures as low as 4 inH2O (10 cmH2O) or as high as 1500 psi (100 bar). Pneumatic testers have accuracies up to ±0.015% of reading and repeatability up to ±0.005% of reading. These testers are superior to all digital systems.

Hydraulic deadweight testers

Achieve the highest possible accuracy of pressure generation and measurement with hydraulic deadweight testers. Hydraulic testers offer excellent performance and long-term stability and they feature a proven design that will deliver years of trouble-free operation.

  • Repeatability better than ±0.005% of reading
  • Accuracy up to ±0.025% of reading and even better using a additional converter
  • Dual volume control valve delivers high volume to rapidly build pressure
  • Vernier adjustment for fine adjustment of pump pressure
  • Re-entrant type piston and cylinder assembly maintains accuracy as test pressure increases and improves the spin and float times
  • Single and dual-column versions. Conversion kits available
  • Enclosed piston/cylinder assembly for safe operation
  • Available engineering units: psi, bar, kPa, kg/cm2

U-tubes — Liquid Manometers

U-tube manometers for relative and absolute pressures, vacuum and differential pressures.
These devices are primary standards and are void of faults within their physical tolerances. They are designed to measure pressure and are suitable for calibrating high precision pressure sensors.

Digital Pressure Calibrators

Use these calibrators in process control applications such as verification or calibration of pressure gauges, transducers, transmitters, pressure switches and safety valves. Combining the accuracy of a laboratory instrument with the functionality and portability of a field calibrator. Digital pressure calibrators are portable, self-contained precision instruments delivered as complete ready to use systems or as a stand alone indicator.

  • Easy-to-read LCD display that indicates pressure, mA, or voltage signals and percent of full scale simultaneously.
  • Store peak values (upper and lower).
  • Single button zeroing.
  • Shutoff feature that extends battery life.
  • Available in 10 different pressure ranges from -0.85 bar (25 inHg vacuum) to 700 bar (10,000 psi).
  • Instant conversion of pressure readings to common units of measure, e.g. bar, kPa, mPa, Atm, kgf/cm2, cmH2O, mmHg, psi, inH2O, inHg, ftH2O.
  • Input for voltage (0-30 V).
  • Input for mA (4-20 mA or 10-50 mA).
  • Pressure switch test indicates opening or closing point.
  • Accuracy of ±0.04% of reading + 0.01% of full scale.
  • Intrinsic safety approvals - US and European.
  • Pressure switch inputs.
  • Selectable units of measure.
  • Complete solutions (minimize the risk of errors).
  • Time saving features: leak rate, freeze display, zero-display, multiple enginering units.

Dial Gage Test Systems

These systems display the reference pressure using an analog gage. The pump systems vary according to the pressure range selected from vacuum to 700 bar (10,000 psi). Dial gage pressure testers are economical and easy to use and ideal for applications where high accuracy is not necessary.

Pump Systems

From small 'bicycle' type pumps to a hydraulic pump that generates up to 15,000 psi (1,000 bar). These are durable pumps with features such as vernier valves, vent valves, manifold connections and swivel fittings, making the pumps ready for your calibration applications.

Pneumatic Pump Systems

— Designed for applications up to 15 bar (200 psi) and/or vacuum.

Hydraulic Pump Systems

— For high pressure application up to 1,000 bar (15,000 psi).
Pressure media: Water, Oil.