Thermistor temperature measurement is based on the fact that the resistance value of a metal conductor increases as the temperature increases.
Most of the sensor's thermal resistance is made of pure metal materials. Currently, platinum and copper are the most widely used. In addition, thermal resistances such as nickel, manganese and tantalum have been used.
Thermistor sensor mainly measures the temperature and temperature-related parameters by using the characteristic that the resistance value changes with temperature. This type of sensor is suitable when the temperature detection accuracy is relatively high. At present, a wide range of thermal resistance materials are platinum, copper, nickel, etc., which have the characteristics of large temperature coefficient of resistance, good linearity, stable performance, wide temperature range, and easy processing. It is used to measure temperatures in the range of -200 ° C to +500 ° C.
Thermal resistance sensor classification:
1, NTC thermal resistance sensor:
This type of sensor is a negative temperature coefficient sensor, that is, the resistance of the sensor decreases with increasing temperature.
2, PTC thermal resistance sensor:
This type of sensor is a positive temperature coefficient sensor, that is, the resistance of the sensor increases with increasing temperature.
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