TACHOMETER
Tachometer
A tachometer 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 on a calibrated analogue dial, but digital displays are increasingly common.The above text is a snippet from Wikipedia: Tachometer
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tachometer
Noun
- A device for measuring the revolutions per minute (RPMs) of a revolving shaft, as with the driveshaft of an automobile.
- A device for measuring or indicating velocity or speed, as of blood, a river, a machine, etc.
The above text is a snippet from Wiktionary: tachometer
and as such is available under the Creative Commons Attribution/Share-Alike License.