NTC thermistor temperature sensors
Thermistor is a semiconductor resistor whose resistance various significantly with temperature. Depended on the character of these changes we distinguish:
NTC thermistors (negative temperature coefficient) whose resistance drops when the temperature is rising.
PTC thermistors (positive temperature coefficient) whose resistance rises when the temperature is rising.
Thermistors are widely used in electrical industry as temperature sensors, thermal compensation instruments, etc.
As NTC thermistors are most commonly used as temperature sensors, this article refers only to them.
The main advantage of thermistors is their high sensitivity and, in a consequence, easiness of temperature measurement. Thermistors are excellent in temperature regulation. Unfortunately, due to to the poor repeatability of individual sensors, they are inadequate for precise measurements of absolute temperatures.
In madur apparatus, NTC thermistors are used as auxiliary temperature sensors in many different applications.