The most often used temperature sensors are thermocouple devices. This is due to the fact that thermocouples exhibit steady performance, a broad temperature measuring range, long-distance signal transmission, etc. They also have a straightforward structure and are simple to operate. Thermocouples make display, recording, and transmission simple by directly converting thermal energy into electrical impulses.
The Seibel effect is the basis for the thermocouple temperature sensor, which measures temperature. Current will flow through a closed loop formed by the two separate homogeneous conductors A and B when there is a temperature differential (T-T0) between the ends of the loop. By sensing the potential created by the current, the thermocouple temperature sensor determines the temperature of the hot spot being monitored.