Which device is a precision electrical switch used to control the movement of mechanical devices?

Which device is a precision electrical switch used to control the movement of mechanical devices?

• A. Micro Switch
• B. DPDT
• C. Rotary Switch
• D. Relays

Answer: (A)

Micro switches are built as small, highly precise switches with a well-defined actuation point and a snap-action mechanism. That means a tiny amount of mechanical movement can reliably trigger the electrical contact, producing a fast, decisive on/off signal. This precision is why they’re used to control the movement of mechanical parts—such as stopping a motor exactly when a component reaches a limit or triggering a control system at a specific position. They’re designed for high cycle life and repeatability, which is essential in position sensing and end-of-travel detection. The other devices serve different roles. A DPDT switch provides two poles and two throws for routing or reversing circuits, but it isn’t intended as a position-sensing device for mechanical movement. A rotary switch selects among several circuit paths or settings, not as a precise end-of-travel sensor. Relays are electromechanical switches driven by a coil to control circuits, not the precise mechanical movement detection itself, though they can actuate other components.

Micro switches are built as small, highly precise switches with a well-defined actuation point and a snap-action mechanism. That means a tiny amount of mechanical movement can reliably trigger the electrical contact, producing a fast, decisive on/off signal. This precision is why they’re used to control the movement of mechanical parts—such as stopping a motor exactly when a component reaches a limit or triggering a control system at a specific position. They’re designed for high cycle life and repeatability, which is essential in position sensing and end-of-travel detection.

The other devices serve different roles. A DPDT switch provides two poles and two throws for routing or reversing circuits, but it isn’t intended as a position-sensing device for mechanical movement. A rotary switch selects among several circuit paths or settings, not as a precise end-of-travel sensor. Relays are electromechanical switches driven by a coil to control circuits, not the precise mechanical movement detection itself, though they can actuate other components.