Pressure Calibrators

Pressure calibrators generate, measure, and verify pressure signals to test and calibrate pressure gauges, transmitters, switches, and transducers. We stock handheld, benchtop, and deadweight pressure calibrators for field service, process industries, and calibration lab use.

Types of Pressure Calibrators

Handheld pressure calibrators combine a pressure source or pump with a reference measurement display, making them ideal for field calibration of gauges and transmitters. Deadweight testers provide the highest level of accuracy by using calibrated weights to generate a known pressure, commonly used as a primary reference standard in calibration labs. Documenting process calibrators add the ability to source and measure electrical signals (mA, mV) alongside pressure, useful for calibrating transmitters in a single workflow.

Pressure Range & Media

Ranges in this category span from low-pressure/vacuum applications (a few inches of water column) up to high-pressure hydraulic testing (10,000+ psi). Pneumatic pressure calibrators are used for gas media, while hydraulic pressure calibrators are required for liquid-filled systems at higher pressures.

Accuracy & Traceability

Reference accuracy typically ranges from 0.025% to 0.1% of full scale depending on the model and intended use. For applications requiring documented accuracy — audits, ISO/IEC 17025 lab work, or regulatory compliance — choose a calibrator shipped with a NIST-traceable calibration certificate.

Common Applications

• Field calibration of pressure gauges and transmitters
• Calibration lab reference standards
• Process instrumentation verification
• Safety relief valve testing
• HVAC and pneumatic system diagnostics

Not sure which pressure calibrator fits your application? Contact our team — we can help match range, media type, and accuracy to your specific requirement.

Frequently Asked Questions

What’s the difference between a pressure calibrator and a pressure gauge?

A pressure gauge simply displays a pressure reading, while a pressure calibrator generates and/or measures pressure to a known reference accuracy, allowing it to test and calibrate other pressure instruments.

Do I need a pneumatic or hydraulic pressure calibrator?

Pneumatic calibrators use air or gas and are suited for lower-pressure applications up to a few hundred psi. Hydraulic calibrators use liquid media and are required for higher-pressure testing, typically above 1,000 psi.

What accuracy do I need for my calibration work?

As a general rule, your calibrator’s accuracy should be at least 4 times better than the accuracy of the device under test, to maintain a valid calibration.

Do you provide calibration certificates for pressure calibrators?

Yes, select models are available with a NIST-traceable calibration certificate at the time of purchase. Look for the certification filter above or contact us for a custom calibration request.