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Tachometers

A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common.

Tachometers are designed for applications such as Motor Speed/Conveyor Speed/Fan Speed/Length Measurements that measure rpm of motors or shafts, either contact or non-contact with Laser style combination tachometer.