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Which of the following are NOT temperature measuring devices?

Which of the following are NOT temperature measuring devices? Correct Answer Manometers

Semiconductor Thermometers (Semiconductor Temperature Sensors):

  • They contain two similar diodes with temperature-sensitive voltage and current characteristics to measure the temperature changes effectively.
  • Semiconductor temperature sensors are devices that come in the form of integrated circuits (IC).
  • These are the electronic devices manufactured in an identical fashion to present-day electronic semiconductor devices like microprocessors.
  • AD590 and the LM35 are examples of it.
     

Thermocouples:

  • The thermocouple is an electrical device containing junctions of two dissimilar metal joints.
  • It is used as a temperature sensor.
  • It works on the principle of the Seebeck effect which states that the temperature difference between two dissimilar electric conductors produces a voltage difference between them.
  • This potential difference is used to measure temperatures.
     

Radiation pyrometers:

  • They are used to measure temperatures of red hot metals up to 3000°C.
  • These concentrate thermal rays through an optical lens and focus them on to a thermoelement.
  • The scale of the ammeter is calibrated in degrees Celsius or Kelvin.
     

Note: A Manometer is a device to measure pressures.

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