Advantages of Thermocouples and RTD over Thermistors

Advantages of Thermocouples and RTD over Thermistors

  • Because Thermistors are semiconductors, they are more susceptible to permanent de-calibration at high temperatures than are RTD’s or thermocouple.
  • The use of thermistors is generally limited to a few hundred degree Celsius and manufacturers warn that extended exposures even well below maximum operating limits will cause the thermistor to drift out of its specified tolerance.
  • Thermistors can be made very small which means they will respond quickly to temperature changes. It also means that their small thermal mass makes them especially susceptible to self-heating errors.
  • Thermistors are good deal more fragile than RTD’s or thermocouple and they must be carefully mounted to avoid crushing or bond separation.
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