Thermistor Sensor

Temperature sensor

A thermistor is a type of resistor that use to sense cold and heat. It also called a thermal resistor and whose resistor changes with change in temperature.

They are reliable, cheap and responds quickly, therefore, they are used for simple low temperature but not for high temperature.

They are used in home appliances, refrigerator, and circuit protection.

Thermistors are of two opposite fundamental types:

  • NTC Thermistor (Negative temperature coefficient):- In NTC, when the temperature is increased then resistance decreased. It is commonly used as a temperature sensor. Suitable temperature range is between -55°C to +150°C.
  • PTC thermistors (Positive temperature coefficient):- In PTC, when the temperature is increased then resistance increased.


  • In circuit protection.
  • Uses in home appliances like refrigerator, ovens.
  • Digital thermometers.
  • Rechargeable batteries.

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