国产铂钴电阻温度计的电阻－温度特性

The resistance-temperature relationship of Chinese platinum-cobalt resistance thermometer

铂＋０．５％（摩尔比）钴稀释合金制成的温度计，３０Ｋ以上Ｗ－Ｔ特性与铂电阻温度计相似，３０Ｋ以下灵敏度明显比铂电阻温度计高，适合于宽温区测量用。本文报告了重庆仪表材料研究所研制的铂钻电阻温度计在４－２９２Ｋ温区的Ｗ－Ｔ特性、水三相点稳定性及定点自热效应，并同日本铂钴电阻温度计特性做了比较。

The sensitivity of the resistance thermometer,which is made ofalloy of platinum with 0.5 atomic per cent of cobalt, is more higher thanthat of the platinum resistance thermometer below 30 K,Platinum-cobaltresistance thermometer could be used at a wide temperature range from theroom temperature to down to 1 K。This paper presents the R-T characte-ristics at the range from 4 to 292 K for Chinese platinum-cobalt resistancethermometer,which is made by Chongqing Institute of Materials for Instru-ments.The results of stability at R(273.16K)and the self-heating effectfor the thermometer reported here. The characteristics of Chinese sensorare also compared with that of the sensor made by Chino Works Limitedof Japan。