The thermistor is a type of sensitive component and is divided into a positive temperature coefficient thermistor (PTC) and a negative temperature coefficient thermistor (NTC) according to the temperature coefficient. Typical characteristics of thermistors are temperature sensitive and exhibit different resistance values ​​at different temperatures. The positive temperature coefficient thermistor (PTC) has a higher resistance value at higher temperatures, and the lower the resistance value of the negative temperature coefficient thermistor (NTC) at higher temperatures, they belong to the semiconductor device.
The main characteristics of the thermistor are: 1 high sensitivity, its temperature coefficient of resistance is 10 to 100 times larger than metal, can detect temperature changes of 10-6 ° C; 2 wide operating temperature range, room temperature device is suitable for -55 °C ~ 315 ° C, high temperature device temperature is higher than 315 ° C (currently up to 2000 ° C), low temperature device is suitable for -273 ° C ~ 55 ° C; 3 small volume, can measure other voids, cavities and organisms that can not be measured by thermometer The temperature of the blood vessels in the body; 4 is convenient to use, the resistance value can be arbitrarily selected between 0.1 and 100 kΩ; 5 is easy to process into a complex shape, can be mass-produced; 6 has good stability and strong overload capability.

Thermistor compensation circuit diagram