PT100 temperature sensor circuit diagram
 

PT100 Temperature Sensor is a thermistor resistance with a temperature coefficient . Speaking of what is a positive temperature coefficient? It is necessary to combine negative temperature coefficient . As the temperature rises, the resistance of the resistance becomes larger, that is, the thermistor resistance of the temperature coefficient . On the contrary The value becomes smaller, that is, the thermistor of the negative temperature coefficient.

The reason why the PT100 temperature sensor is widely used is not only because it can measure the temperature range (to minus tens of degrees to zero hundreds of hundreds), but also because its linearity is not often good. "Linearity", the straightforward point is that the temperature is every time, and the range of the resistance of the resistance is basically the same. In this way, we greatly simplify our procedures.