MRO Magazine

Self-calibrating thermometers

July 4, 2023 | By MRO Staff

Photo: Endress+Hauser

Photo: Endress+Hauser

Endress+Hauser generation 2.0 iTHERM TrustSens TM371/TH372, self-calibrating RTD thermometer for hygienic operations.

Gen 2.0 includes new smart and safe features, including a wider operating temperature range (-40 to 190ºC), explosion protection, optional Bluetooth/WirelessHeart connectivity and potential integration with Netilion.

Certification for Ex-ia/IS makes it suitable for dust and gas applications like storage of grains, flour or pet food or for monitoring production of milk powder and alcohol or for sterile filling or ethylene oxide sterilization.

The iTHERM TrustSens TM372 (imperial style) and its metric equivalent, TM371, enables continuous, traceable monitoring thanks to their fully automated inline self-calibration function without process interruption.


The sensor unit consists of a primary Pt100 temperature sensor and a integrated reference with long-term stability. The reference sensor uses a physical fixed point on the basis of the Curie temperature. The self-calibration is triggered automatically at a temperature of 118°C. The iTHERM TrustSens has a <0.35 K to <0.55 K calibration uncertainly compared to manual calibration.



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