revolution counter

noun

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

Example Sentences

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

From Literature

The torpedo was designed to fly a preset magnetic course at a fixed altitude, wait until an engine revolution counter determined that it had achieved the desired range, and then dive onto an enemy ship that was had been calculated to be below.

From Salon

The torpedo was designed to fly a preset magnetic course at a fixed altitude, wait until an engine revolution counter determined that it had achieved the desired range, and then dive onto an enemy ship that was had been calculated to be below.

From Salon

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