Abstract
The stability of eleven standard-type rhodium-iron resistance thermometers of Chinese manufacture has been studied while they were exposed to 30 thermal cycles between 293 and 4.2 K. Over these cycles, seven of the eleven thermometers remained stable at 24.5 K within the 0.1 mK precision of the measurements. Two of the thermometers exhibited unstable behaviour at the 10 mK level. The characteristic resistance versus temperature behaviour of, and the self-heating effect in, the other nine thermometers, together with that of two other thermometers of the same type, have been studied in the temperature range 1.3-27 K. The Chinese thermometers appear to be similar in behaviour to the more familiar rhodium-iron thermometers manufactured by H. Tinsley and Co. Ltd.
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