inductor tachometer

inductor tachometer

[in′dək·tər tə′käm·əd·ər]
(engineering)
A type of impulse tachometer in which the rotating member, consisting of a magnetic material, causes the magnetic flux threading a circuit containing a magnet and a pickup coil to rise and fall, producing pulses in the circuit which are rectified for a permanent-magnet, movable-coil instrument.