A limit switch is a type of electrical switch commonly used in machinery and industrial applications to control and monitor the movement or position of mechanical components. It serves as a sensing device that detects the presence or absence of an object, the position of a moving part, or the limits of motion within a machine.

Limit switches play a crucial role in enhancing the functionality, safety, and automation of machinery and industrial processes. They provide feedback or control signals to the machine's control system, allowing for precise control and monitoring of movement, position, and operational limits. By utilizing limit switches, machinery can be operated more efficiently, with increased reliability and safety.