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What is the name for a device that measures the rate of rotation of a revolving shaft?

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What is the name for a device that measures the rate of rotation of a revolving shaft?
posted Nov 29, 2017 by Upma

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1 Answer

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A tachometer is an instrument designed to measure the rotation speed of a shaft or disk. Tachometers generally measure rotations per minute (RPM) though some models also serve as rate meters and/or totalizers.

answer Dec 5, 2017 by Shreya Hiwale
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