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

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

While a coil is being wound, it is a simple matter to count the turns by any simple form of revolution counter.

From Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. by Miller, Kempster