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The chief advantages of an LVDT over a potentiometric transducer are

  • A.no sliding contact and therefore no friction or wear
  • B.a very much larger output requiring no amplification at all
  • C.the ability to work from a steady direct voltage supply
  • D.a linear output over a range of many hundreds of millimetres

Answer: A

Nothing touches, so the device has an indefinite mechanical life and adds no friction to the mechanism. The costs are the need for an alternating excitation and a phase-sensitive detector, though both are now packaged with the device.

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