The resistance of NTC Thermistors changes by 3 to 5%/°C to the temperature change. This is used in many electronic devices as a general temperature sensor!
Example, Smart Phones;
When you are using a Smart Phone, have you ever experienced that the "body of the phone gets hot?"
It can be said that thin and highly efficient Smart Phones are small PCs. The body tends to become hot because unlike PCs, there is no fan or etc. to release the heat. Therefore, there is a risk of the precision components which are sensitive to heat being damaged.
The NTC Thermistors come into play in such conditions! !
NTC Thermistors measure the temperature inside Smart Phones, and perform various control using the temperature information.