revolution counter

American  

noun

1. a device for counting or recording the number of revolutions made by a rotating shaft, as of a motor or engine.

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Example Sentences

I tried to steal a quick glance at my revolution counter.

From Time Magazine Archive

In the machines they were accustomed to there was nothing but a revolution counter, and sometimes, though not always, a compass.

From Project Gutenberg

The watch, anemometer and revolution counter were all automatically started and stopped simultaneously.

From Project Gutenberg

I had nothing to do other than to give occasional attention to the revolution counter, altimetre, and speed-dial.

From Project Gutenberg

I will not stigmatize this Convention as a political body, or assert that this is a movement toward a revolution counter to a political revolution just accomplished by the elections.

From Project Gutenberg