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The hydrostatic pressure effect on the emf of the Chromel/Alumel thermocouple has been found to be very small between 4.2 and 300 K up to 22 kilobar. This makes the Chromel/Alumel thermocouple the best temperature sensor yet for high-pressure and low-temperature study.
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Diatschenko et al. (1975) studied this question.
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