The principle, detection method and application of thermistor 1

Thermistor is a temperature sensitive component whose resistance value changes with temperature. Thermistors can generally be divided into two categories: positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC). The resistance value of PTC thermistor increases with temperature, while the resistance value of NTC thermistor decreases with temperature. These characteristics make thermistors widely used in temperature detection, temperature control, and overheating protection.diode

The principle of thermistor

The working principle of a thermistor is based on the sensitivity of its material to temperature changes. When the temperature changes, the number or mobility of charge carriers in the thermistor material changes, resulting in a change in its resistance value. For NTC thermistors, they are usually made of semiconductor materials such as oxides. As the temperature increases, the number of charge carriers in the material increases, resulting in a decrease in resistance. PTC thermistors are often made of polymers or ferroelectric materials, and an increase in temperature causes changes in their internal structure, resulting in an increase in resistance.diode