Temperature Calibrators

Temperature calibrators generate a precise, stable reference temperature to test and calibrate thermocouples, RTDs, and other temperature sensors and instruments. We stock dry-block and portable temperature calibrators for field service, industrial maintenance, and calibration lab use.

Dry-Block vs. Liquid Bath Calibrators

Dry-block temperature calibrators use a metal insert block with drilled wells to accommodate sensors, heating or cooling the block electrically to a stable reference temperature, offering a fast, portable option that doesn’t require fluid handling. Liquid bath calibrators use a temperature-controlled liquid for immersion calibration, generally providing better uniformity for irregularly shaped sensors but requiring more setup and fluid management than a dry-block unit.

Temperature Range & Stability

Portable dry-block calibrators typically cover a range from around -25°C up to 660°C or higher depending on the model, with stability and uniformity specifications determining how precisely the reference temperature is maintained during a calibration procedure. Documenting temperature calibrators add the ability to simultaneously read and record the output signal from the sensor under test, streamlining calibration documentation.

Insert Selection

Interchangeable inserts allow a single dry-block calibrator to accommodate different sensor types and diameters, from thermocouples and RTDs to specific probe geometries used in process industries. Selecting the correct insert for your sensor size and type is important for accurate heat transfer and calibration results.

Common Applications

• Thermocouple and RTD calibration
• Field calibration of temperature transmitters
• Process instrumentation temperature verification
• Calibration lab reference standard work
• Preventive maintenance for temperature sensors

Not sure which temperature calibrator fits your application? Contact our team — we can help match temperature range, stability, and insert compatibility to your specific requirement.

Frequently Asked Questions

Should I use a dry-block or liquid bath calibrator?

Dry-block calibrators offer a fast, portable option without fluid handling, well suited for field use. Liquid bath calibrators generally provide better temperature uniformity for irregularly shaped sensors but require more setup and maintenance.

Do I need interchangeable inserts?

Yes, if you calibrate multiple sensor types or sizes, interchangeable inserts allow one dry-block calibrator to accommodate different probe diameters and types rather than requiring a separate unit for each.

What’s a documenting temperature calibrator?

A documenting calibrator can simultaneously generate the reference temperature and read/record the output signal from the sensor under test, streamlining the calibration process and record-keeping compared to using separate reference and readout devices.

Do you provide calibration certificates for temperature 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.