Thermistor Resistance Chart

NTC Thermistors

Negative temperature coefficient (NTC) thermistors have a resistance which reduces as the temperature rises (fig 1.). They are used for resistance thermometers in temperature measurement and all Sterling Sensors assemblies are made using this type of thermistor.

Fig 1. (NTC Thermistor graph)

PTC thermistors

Positive temperature coefficient thermistors have a resistance which rises as the temperature increases (Fig 2.) and are not used for temperature measurement. They are ideal as current and temperature limiting devices for circuit protection, such as Lithium batteries.