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

A final twist, a glance at the revolution counter, and he was done.

From "Brave New World" by Aldous Huxley

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

From The Early History of the Airplane by Wright, Orville

Besides, the pulley shaft actuates a revolution counter, and a clock measures the time employed in the experiment.

From Scientific American Supplement, No. 787, January 31, 1891 by Various

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

From The War in the Air; Vol. 1 The Part played in the Great War by the Royal Air Force by Raleigh, Walter Alexander, Sir