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Difference between RTD and thermistor

As we know that the RTD and thermistor both are temperature measuring device. The major difference between the thermistor and RTD is that the RTD is made of metal while the thermistor is made that semiconductor material. Let us have a deep insight into the comparison between them and understand more about RTD and thermistor. 

Difference between RTD and thermistor :

  • The RTD is made of the metal a positive temperature coefficient whereas the thermistor is made of the semiconductor materials.
  • The RTD is less sensitive as compared to the thermistor.
  • The cost of the thermistor is much higher than RTD.
  • The size of the RTD is much larger as compared to the thermistor material.
  • The resistivity of the RTD is less as compared to the thermistor.
  • The thermistor gives a quick response to the small changes, whereas the response time of the RTD is low.
  • The characteristics are used for measuring the small range of the temperature up to 130 °C whereas the RTD measures the temperature up to 660 °C.
  • The hysteresis effect in the thermistor is much high as compared to the RTD device.
  • The characteristics graph between resistance and temperature of the RTD is linear whereas that of the thermistor it is nonlinear.
  • The RTD used in the industries for measuring the high temperature whereas the thermistor we used in home appliances for measuring the small temperature.
  • The accuracy of the RTD is low as compared to the thermistor.
  • The RTD is made of metals having a positive temperature coefficient whereas the thermistor is made of the semiconductor materials.
  • Thermistor has a much faster response time compared to RTDs.
  • RTDs have a greater temperature range compared to thermistors devices.

Conclusion:

Thermistor and RTD both are the temperature sensing device. A thermistor is used for measuring the temperature of small devices while RTDs is used for measuring the high temperature.

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