The main difference between thermocouple and thermal resistance
First, the nature of the signal, the thermal resistance itself is resistance, temperature change, the resistance produces positive or negative resistance value change; And the thermal coupling, it's generating a change in the induced voltage, which varies with the temperature.
Two, the temperature range detected by the two sensors is different, the thermocouple measurement range is wide. Thermal resistance is used for low temperature detection, thermocouple is often used for high temperature detection.
Three, from the material, thermal resistance is a metal material, with temperature sensitive change of the metal material; Thermal coupling is a bimetallic material, that is, two different metals, due to the change in temperature, at the two ends of two different metal wire potential difference.