Voltage Divider Cold Sensor - Thermistor

Voltage Divider Cold Sensor - Thermistor

A graphic showing an example of a voltage divider. A thermistor is connected in parallel to a resistor and an input voltage. The output voltage is the voltage across the thermistor. The output is high if the temperature is low.

an electrical resistor whose resistance is greatly reduced by heating, used for measurement and control.

Thermistors are thermally sensitive resistors whose prime function is to exhibit a large, predictable and precise change in electrical resistance when subjected to a corresponding change in body temperature. Negative Temperature Coefficient (NTC) thermistors exhibit a decrease in electrical resistance when subjected to an increase in body temperature and Positive Temperature Coefficient (PTC) thermistors exhibit an increase in electrical resistance when subjected to an increase in body temperature.

Thermistors are temperature-sensing elements made of semiconductor material that has been sintered in order to display large changes in resistance in proportion to small changes in temperature. This resistance can be measured by using a small and measured direct current, or dc, passed through the thermistor in order to measure the voltage drop produced.

Thermistors are an incredibly accurate category of temperature sensors.

In general, thermistors are composed of sintered ceramics consisting of highly sensitive material with consistently reproducible properties of resistance versus temperature.

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