NTC thermistor is a type of sensitive element. The resistance value of the thermistor will change with temperature. It is different from the general fixed resistance. It belongs to the type of variable resistance and is widely used in various electronic components. . Unlike a resistance thermometer, it uses pure metal, and the material used in the thermistor is usually ceramic or polymer. NTC thermistors usually achieve higher accuracy within a limited temperature range, usually -90°C-130°C.

The relationship between NTC thermistor resistance and temperature:

The thermistor is characterized by being sensitive to temperature and exhibiting different resistance values ​​at different temperatures. The positive temperature coefficient thermistor (PTC) has a higher resistance value when the temperature is higher, and the negative temperature coefficient thermistor (NTC) has a lower resistance value when the temperature is higher. They are both semiconductor devices.



Features of thermistor:

1. High sensitivity, its resistance temperature coefficient is 10-100 times larger than that of metal, and it can detect temperature changes of 10-6℃.

2. Wide operating temperature range, room temperature devices are suitable for -55℃～315℃, high temperature devices are suitable for higher than 315℃ (currently up to 2000℃), low temperature devices are suitable for -273℃～-55℃.

3. It is small in size and can measure the temperature of voids, cavities and blood vessels in organisms that other thermometers cannot measure.

4. Easy to use, the resistance value can be arbitrarily selected between 0.1-100kΩ.

5. It is easy to process into complex shapes and can be mass produced.

6. Good stability and strong overload capacity.