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Tachometer facts for kids

Kids Encyclopedia Facts
Speedometer
Left figure shows a tachometer that can show up to 7000 RPM

A tachometer is a sensor that measures the rotation speed of an object, for example a wheel or shaft. There are different methods to do so (for example, mechanical, optical, or magnetic). Most tachometers display the measurement in revolutions per minute.

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Tachometer Facts for Kids. Kiddle Encyclopedia.