The Difference Between Thermocouple And Thermal Resistance
Thermocouple is a sensor for measuring temperature. It is a temperature sensor like a thermal resistance, but the main difference between it and a thermal resistance lies in:
First, the nature of the signal. The thermal resistance itself is a resistance. The change of temperature causes the resistance to produce a positive or negative resistance change; while the thermocouple produces a change in the induced voltage, which changes with the change of temperature.
Second, the temperature ranges detected by the two sensors are different. The thermal resistance generally detects the temperature range of 0-150 degrees (of course it can detect negative temperatures), and the thermocouple can detect the temperature range of 0-1000 degrees (or even higher). Therefore, the former It is low temperature detection, and the latter is high temperature detection.
Third, from the point of view of material, thermal resistance is a metal material with temperature-sensitive changes. The thermocouple is a bimetallic material. Two different metals. Due to temperature changes, between two different metal wires There is a potential difference between the two ends.
