Platinum Resistance Thermometer Calibration Services
A platinum resistance thermometer (PRT) is one of the most precise temperature measurement devices available, providing linearity over a wide range and response times of less than a second. To get the most out of your PRT, regular calibration services are a must. No matter what industry you work in, testing your PRT against a temperature reference ensures the precision of your measurements, and prevents drift that can lead to increasingly inaccurate measurements over time.
Platinum resistance thermometer calibrations are performed using a standard platinum resistance thermometer (SPRT), which interpolates temperatures over a standard range as dictated by the International Temperature Scale of 1990 (ITS-90), and adopted by NIST and other standard-setting bodies. Additional calibrations may be performed at application-specific temperatures to ensure that the PRT is accurate at the temperatures for which it is regularly used. The SPRT itself is calibrated against standard fixed-point cells, which in turn are calibrated against the ITS-90.
Increase Accuracy with Accredited Temperature Calibration
Transcat's temperature calibration services are performed in an ISO 17025-accredited temperature calibration laboratory, and are ISO 9001-compliant with true SI Unit traceability through NIST, equivalent sources, or physical constants. Our Hart 5699 SPRT allows us to provide PRT/SPRT calibration from -195C to 1,000C, and we offer reference-level PRT/SPRT probe and primary standard temperature calibrations by comparison to indium, tin, zinc, and aluminum fixed-point reference cells.
How is Platinum Resistance Thermometer Calibration Performed?
- The PRT is placed in a stirred liquid temperature bath with an SPRT, and both are submerged to a specific depth dictated by the PRT/SPRT probes' diameter and the length of the sensors
- The bath is engineered and calibrated to a stabilized temperature source, which provides a reliable foundation for the PRT/SPRT calibration process
- The resistance of the PRT being tested is recorded at specific temperatures in the calibration range, and the results are plugged into a mathematical formula that takes a variety of variables into account, including the PRT reading, the SPRT reading, the temperature standard, and multiple correction factors
- The resulting correction factor dictates the adjustments required to return the PRT to optimal performance
Transcat Offers Full Service PRT/SPRT Calibration Solutions
- Transcat's Philadelphia calibration lab and Dayton, OH, calibration lab offer highly accurate reference-level temperature calibration, and specialize in PRTs, SPRTs, and secondary SPRTs
- We are proud to offer calibration services for a broad array of RTD probes, including the Fluke Calibration 5600 series, and all models and ranges from Thermo Probe, Isotech, Ametek, and more
- We can perform high-quality calibration for OEM systems or custom specifications at your location, or take advantage of our pickup and delivery service to have your calibrations performed in our accredited calibration laboratory