bn:00075846n
Noun Concept
Categories: Measuring instruments, Speed sensors, Aircraft instruments, Navigational flight instruments, Automotive technologies
EN
tachometer  tach  rev-counter  revolution-counter  RPM gauge
EN
Measuring instrument for indicating speed of rotation WordNet 3.0
Definitions
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EN
A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. Wikipedia
A device that measures the revolutions per minute of a revolving shaft. OmegaWiki
A device for measuring the revolutions per minute (RPMs) of a revolving shaft, as with the driveshaft of an automobile. Wiktionary