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Which among the following is a non-contact type of temperature sensor?

Which among the following is a non-contact type of temperature sensor? Correct Answer Pyrometer

Pyrometer:

  • Radiation thermometers are known as a pyrometer.
  • This type of sensor detects infrared emitted from the object and measures temperature based on the amount of infrared radiation.
  • Because this is a non-contact type, temperature measurement of moving/rotating objects or objects that may be influenced by the contact of the sensor can be achieved.
  • It is a non-contact type of temperature sensor.
  • The radiation thermometer cannot be used for measuring the temperature of the inside of the object or the gaseous atmosphere.

Additional InformationThermistor:

  • It is a kind of resistor whose resistivity depends on the surrounding temperature.
  • It is a temperature-sensitive device that converts temperature to an electrical signal by a change in resistance.
  • The word thermistor is derived from the word, thermally sensitive resistor.
  • The thermistor is made of semiconductor material that means its resistance lies between the conductor and the insulator.
  • The variation in the thermistor resistance shows that either conduction or power dissipation occurs in the thermistor.
     

Thermocouple:

  • Thermocouples are very common temperature sensors in process plants.
  • Thermocouples have few benefits that make them widely used.
  • They can be used to measure very high temperatures, much higher than with RTDs (Resistance temperature detector).
  • The thermocouple is also a very robust sensor, so it does not break easily.

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