Highly accurate traceable temperature standard probe for calibrating sensors from -196 to 420°C with an accuracy of +/- 0.025. Easy to read data with the Kaye IRTDWin™ software. The IRTD is a high accuracy traceable temperature standard probe used as part of the Kaye Validation systems for calibrating sensors. During sensor calibration / verifications, sensors are compared against the IRTD and offsets are automatically calculated and stored. The broad temperature range from -196 to 420°C, enables it to be used in virtually all temperature validation applications. https://www.kayeinstruments.com/en/calibration-references/the-htr-and-ltr-series-3/kaye-irtd-400-intelligent-rtd-secondary-standard