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热电偶是一种广泛使用的感温元件。一般按热电偶的用途可分为:基准热电偶、标准热电偶和工业实验室用的热电偶。所谓标准化热电偶是指工艺上比较成熟,应用面广,且能成批生产并已列入工业标准化文件中的几种热电偶。它们都有统一的分度表。国际电工委员会IEC于1975年向各成员国推荐使用美国国家标准局颁发的七种热电偶的分度表,它们是: R型——铂铑_(13)-铂热电偶 S型——铂铑_(10)-铂热电偶 B型——铂铑_(30)-铂铑_6热电偶 K型——镍铬-镍硅热电偶
Thermocouple is a widely used temperature sensing element. The general use of thermocouples can be divided into: the benchmark thermocouple, standard thermocouple and industrial laboratory thermocouple. The so-called standardized thermocouple refers to the process is more mature, wide range of applications, and can be mass produced and has been included in the industry standardization of several thermocouples. They all have a uniform index table. International Electrotechnical Commission IEC recommended to member states in 1975 to use the American National Standards Institute issued seven thermocouple index table, they are: R type - platinum and rhodium _ (13) - platinum thermocouple S-platinum Rhodium _ (10) - Platinum Thermocouple Type B - Platinum Rhodium _ (30) - Platinum Rhodium _6 Thermocouple Type K - NiCr - Nickel Silicon Thermocouple