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热电偶是常用的温度检测器之一,它由两根不同性质的金属丝组成.一端焊接在一起,置于要测温的介质中,称为工作端(又叫热端),另一端置于0℃或室温中,称为自由端(又叫冷端).当工作端温度高于自由端的温度时,在自由端便出现了随工作端温度而变的热电动势,将热电动势按温标分度,并用自动电子电位差计测量出来,便可获得热电偶工作端所处位置的温度值.
Thermocouple is a commonly used temperature detector, which consists of two different nature of the wire composition. One end of the welding together, placed in the media to be measured, called the working end (also known as hot end), the other end At 0 ℃ or room temperature, known as the free end (also known as cold end.) When the working end temperature is higher than the free end of the temperature, appeared at the free end with the working end of the temperature change and the thermal emf, the thermoelectric force by temperature scale Graduation, and measured with an automatic electronic potentiometer, you can get the working temperature of the thermocouple where the temperature value.