Tachometer facts for kids
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.
Images for kids
Cessna 172's G1000 tachometer (1,060 RPM) and engine hours (1736.7 hours)
Tachometer Facts for Kids. Kiddle Encyclopedia.