limitswitch
nounUK /ˈlɪmɪt swɪtʃ/
US /ˈlɪmɪt swɪtʃ/
A limit switch is a small part that tells a machine when it has gone far enough.
The elevator stops at the top floor because a limit switch tells it to stop.
OTHER MEANINGS
2. A switch that turns off power when a moving part reaches a set point.
The garage door reverses when its limit switch is pressed.
3. A device used in factories to detect the position of a moving object.
The robot arm paused when it touched the limit switch on the conveyor.
4. A safety component that prevents a machine from moving too far.
Technicians checked the limit switch to make sure the press could not overrun.