1, temperature measurement, as a thermistor sensor for measuring temperature, is generally simple in structure and relatively low in price;
2, temperature compensation, thermistor sensor can compensate the humidity of some components in a certain temperature range;
3, overheating protection, when the temperature is greater than the mutation point, the current in the circuit can be mutated from tens of milliamps to tens of milliamps, so the relay acts, thus realizing overheating protection.