What is the difference between thermocouple and thermistor

Thermocouple - a temperature sensor that measures temperature, similar to a thermal resistor, but it differs from a thermal resistor mainly in that:

1, The nature of the signal is that the thermistor itself is a resistor, and changes in temperature cause a positive or negative resistance change in the resistor; Thermocouples, on the other hand, generate changes in induced voltage that vary with temperature.

2, The temperature ranges detected by the two sensors are different. Thermal resistance generally detects temperatures in the range of 0-150 degrees (although negative temperatures can be detected), while thermocouples can detect temperatures in the range of 0-1000 degrees (or even higher). Therefore, the former is for low-temperature detection, while the latter is for high-temperature detection.

3, From a material perspective, thermal resistance is a type of metal material that is sensitive to temperature changes. Thermocouples are bimetallic materials, where two different metals generate a potential difference at the ends of two different metal wires due to temperature changes.