Improving the Stability of Standard Platinum Resistance Thermometers

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Improving the Stability of Standard Platinum Resistance Thermometers (207.37 KB)

In order to improve the reliability and performance of standard platinum resistance thermometers (SPRTs), much research and investigation has been done at Fluke Calibration. A new short capsule SPRT was designed, gas mixtures for filling long-stem SPRTs were investigated, and the sensor support used in high-temperature SPRTs was redesigned. Through these efforts, the performance of SPRTs have improved. However, there are some difficult challenges to further improve the performance of SPRTs. In the paper, recent work to make further improvements is summarized.