noun
- instruments that measure the rotational speed of a shaft or disk, typically in revolutions per minute (RPM)
Usage: automotive; mechanical
Examples
- The car’s tachometers showed the engine was running at 3,000 RPM.
- Mechanics use tachometers to diagnose engine problems.
- The motorcycle’s digital tachometers displayed precise readings.
- Aircraft engines are equipped with multiple tachometers for safety.
- The factory installed tachometers on all the industrial machines.
- Racing drivers constantly monitor their tachometers during competitions.