WR Assemble thermocouple

The two ends of the conductor with different components are welded to form a loop, the direct temperature measuring end is called the measuring end, and the terminal is called the reference end. When there is a temperature difference between the measuring end and the reference end, the thermal current will be generated in the loop, connected to the display instrument, the instrument indicates the corresponding temperature value of the thermoelectric motive force generated by the thermocouple.