The 3950 NTC Thermistor is a thermally sensitive resistor and the special feature of these 100K ohm thermistors is that they exhibit a large change in resistance with only a small change in temperature. The thermistor is ideally used as a temperature sensor for 3D Printer Reprap. NTC is also known as the Negative Temperature Coefficient. These thermistors are widely used as inrush current limiters, temperature sensors, self-resetting overcurrent protectors, and self-regulating heating elements.

This Thermistor 100k NTC with 1 Meter Cable Temperature Sensor for 3D Printer Reprap. The thermistor is a thermally sensitive resistor known for exhibiting a large change in resistance with only a small change in temperature.

It is important to note that a thermistor's change in resistance is non-linear. It follows a pre-defined curve which is provided by the thermistor manufacturer.

Positive thermal coefficient (PTC) will increase in resistance with an increase in temperature, and negative ones (NTC) will decrease. But the formula in practice is not linear, so sometimes an accurate table of measurements is better than the linear formula. 

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