Answer / priyavats singh

there are many type of sensor used depend on company manufacturing ,but the working principle are, hall effect,eddy current and inductive transducer ,now a days eddy current is most commonly used

Answer / abu maryam

Vibration measuring philosophy may depend on position or speed measurement.
may be measured by sensor use npn transistor and eddy current produced from movable part affect it.
Some sensor is as bellows when the movable part touch it it give signal.

Answer / azam

there r diff companies which make vibration sensors and
their measurement and control panels (B&K germany)
output is in mV.

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