A thermistor is a resistor that varies its resistance with the temperature. There are two main types; those that increase resistance when the temperature rises (PTC), and those that decrease resistance the temperature rises (NTC).


Thermistors are typically suitable for moderate temperatures, like outdoor/indoor applications.


Thermistors are usually defined by their resistance at 25°C and a B-parameter. These two parameters can be used to convert the resistance to an actual temperature. However the relationship between temperature and resistance is not linear and the math required (the Steinhart-Hart equation) to do the conversion is not completely trivial.


The ezeio can be programmed to convert thermistor resistance to temperature. Scripting is required. eze System provides this as a standard support service. Supported 3rd party expansion modules for the ezeio  have the conversion math built-in.


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