两种不同成份的导体（称为热电偶丝材或热电极）两端接合成回路，当接合点的温度不同时，在回路中就会产生电动势，这种现象称为热电效 应，而这种电动势称为热电势。热电偶就是利用这种原理进行温度测量的，其中，直接用作测量介质温度的一端叫做工作端（也称为测量端），另 一端叫做冷端（也称为补偿端）；冷端与显示仪表或配套仪表连接，显示仪表会指出热电偶所产生的热电势。 热电偶与显示仪表等配套，在一定的使用范围内对气体、液体介质固体表面温度进行自动检测或自动调节。确定加热器正常使用延长奉命。 Two different components of the conductor (known as thermocouple wire or hot electrode) at both ends of the circuit into the circuit, when the joint point of the temperature is different, the circuit will produce electromotive force, this phenomenon known as the thermoelectric effect, and this The electromotive force is called thermoelectric potential. Thermocouple is the use of this principle for temperature measurement, which is used directly as the temperature of the measurement medium is called the working end (also known as the measurement side), the other end is called the cold end (also known as the compensation side); cold end and display Instrument or supporting instrument connection, the display instrument will point out the thermocouple generated thermoelectric power. Thermocouple and display instruments, etc., in a certain range of use of gas, liquid medium solid surface temperature for automatic detection or automatic adjustment. To determine the normal use of the extension of the heater was ordered