1000 h stability test of the Au/Pd thermocouple at 1000 °C

A newly developed Au/Pd thermocouple has shown very high reproducibility and good immersion characteristics. A stability test of the Au/Pd thermocouple has been conducted for 1000 h at 1000?C in air to assess its suitability for practical application. Two thermocouples from two manufacturers were fa...

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Veröffentlicht in:Metrologia 1996-08, Vol.33 (4), p.337-339
Hauptverfasser: Kim, Y-G, Gam, K S, Rhee, C
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Rhee, C
description A newly developed Au/Pd thermocouple has shown very high reproducibility and good immersion characteristics. A stability test of the Au/Pd thermocouple has been conducted for 1000 h at 1000?C in air to assess its suitability for practical application. Two thermocouples from two manufacturers were fabricated and their emf values were checked in a silver freezing-point cell before and after the soaking at 1000 C. It was found that the high-temperature stability of the Au/Pd thermocouple is within ?30mK (2sigma) throughout the test time. This result implies that the Au/Pd thermocouple possesses characteristics which may make it suitable for use as a secondary high-temperature thermometer in industry.
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title 1000 h stability test of the Au/Pd thermocouple at 1000 °C
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