本文提出了采用细直径的铂铑-铂偶丝代替常规的φ0.5铂铑-铂偶丝的试验结论。通过合理的制作装配,在高温盐浴炉上进行了严酷环境的考验,其寿命和常规偶丝基本相仿。这种热电偶感温精确度高而时间常数很小,并可收到较大的经济效益。作者认为具有推广价值。 This paper presents the experimental results of the use of thin diameter platinum rhodium - platinum wire instead of the conventional φ0.5 platinum rhodium - platinum couple wire. Through the reasonable manufacture and assembly, the harsh environment test was carried out on the high-temperature salt bath furnace, and its life span was basically similar to that of the conventional wire. This thermocouple temperature accuracy and high time constant is small, and receive greater economic benefits. The author thinks it has promotion value.