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A thermocouple is preferred to a resistance element for exhaust gas temperature because it

  • A.Has higher resolution at low temperature
  • B.Is cheaper to install
  • C.Withstands very high temperature
  • D.Is more linear

Answer: C

The junction survives the gas path where a platinum element would not, and being self-generating it keeps working with the excitation supply lost. Its output depends on a difference, so cold junction compensation is required.

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