What is a Thermistor
Thermistor:
A thermistor is a semi-conducting material such as mixtures of oxides of copper, manganese, cobalt, etc. in the form of a fused bead connected to two leads. As its temperature is increased its resistance rap-idly decreases.
Typical resistance/temperature curves
for a thermistor and common metals are shown in figure below.
The resistance of a typical thermistor can
vary from 400 W at 0°C to 100 W at 140°C.
Advantages of thermistor:
The main advantages of a thermistor are its high sen-sitivity and small size. It provides an inexpensive
method of measuring and detecting small changes in
temperature.
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