Advantages and Drawbacks of using RTD

RTD has some major advantages over most other temperature sensors which are as follows:

  1. Linear Response
    RTD has an output response which remains linear over a wide temperature range. Hence, it is the most preferred sensor when non-linearity is to be avoided.
  2. Wide Range
    The measurement of RTD ranges from negative temperatures to around 800 deg Celsius. This avoids the need to use multiple sensors.
  3. Good stability
    RTD remains stable even at high temperatures.This is an important ability required for high temperature measurements.
  4. High Repeatability and good precision.
  5. Low Drift.
  6. Most accurate and stable over time as compared to other temperature sensors like Thermocouples and Thermistors.
Along with above advantages, RTD also faces some drawbacks which are as follows:
  1. Low sensitivity Sensitivity as and slower response time as compared to thermistors.
  2. Point sensing is not possible
  3. Shock and vibrations affect the reading
  4. Circuit is little more complicated as it requires 3/4 wire measurements
  5. Costlier as compared to other sensors like Thermocouples
  6. Avoided in industries for ranges above 650 deg. C.

    For further information about RTD:

    Types and Classes of RTD                                                What is RTD?

    Related Articles:

    Temperature Units & Conversions                                       Thermocouple