Tachometers

Tachometers

A tachometer is a device used to measure the rotational speed of a shaft or disk in a machine or vehicle. The term tachometer comes from the Greek words tachos meaning speed, and metron meaning measure. Tachometers are commonly found in automobiles, aircraft, and industrial machinery where it is important to monitor the speed of rotating components. The most common type of tachometer is the contact tachometer, which uses a physical contact point to measure the speed of the rotating object. This type of tachometer is typically used in industrial settings where accuracy is important. Another type of tachometer is the non-contact or optical tachometer, which uses a laser or infrared sensor to measure the speed of the rotating object. This type of tachometer is commonly found in automotive and aviation applications. Tachometers are typically calibrated in revolutions per minute (RPM), which is the number of complete rotations the object makes in one minute. Some tachometers also have the ability to measure the frequency of the rotations, which can be useful in certain applications. In addition to measuring speed, tachometers can also be used to diagnose problems with a machine or vehicle. For example, a sudden drop in RPM can indicate a problem with the engine or transmission. Overall, tachometers are an important tool for monitoring the speed of rotating components in a wide range of applications.

rotational speed, contact tachometer, non-contact tachometer, revolutions per minute, frequency

— Christopher Jones

CITATION : "Christopher Jones. 'Tachometers.' Design+Encyclopedia. https://design-encyclopedia.com/define/tachometers?E=400883 (Accessed on October 14, 2026)"