Thermistor

Thermistors are temperature sensors that vary the resistance of the semiconductor element according to the temperature to which they are exposed. There are two types of thermistors:

• NTC (Negative Temperature Coefficient) - thermistors whose coefficient of resistance variation with temperature is negative: resistance decreased with increasing temperature.
• PTC (Positive Temperature Coefficient) - thermistors whose coefficient of resistance variation with temperature is positive: resistance increases with increasing temperature.

Thermistors have a high thermal coefficient which gives them a high sensitivity, causing great resistance variations for small temperature variations.