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tachometer
Sign in to saveAlso known as revolution-counter, tach, rev-counter, RPM gauge, tacho, RPM meter, tachometers
thumb|300px|A tachometer that can indicate up to 7000 revolutions per minute|RPM (left)
~11 min read
Encyclopedic overview
7 sectionsContents
- History
- In automobiles, trucks, tractors and aircraft
- Traffic engineering
- In trains and light rail vehicles
- In analogue audio recording
- See also
- References
thumb|300px|A tachometer that can indicate up to 7000 revolutions per minute|RPM (left)
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.
Excerpted from Wikipedia’s “tachometer” article, available under the CC BY-SA 4.0 licence.