A cylindrical magnetic switch that detects the presence or absence of a magnet and opens/closes an electrical circuit, commonly used in machinery and equipment to monitor position.

A small magnetic switch that detects when a magnet moves near it, commonly used to sense position or movement in machines and equipment.

A small magnetic reed switch that detects when a magnet is nearby and opens or closes an electrical circuit, used to monitor door, window, or equipment positions in industrial and building automation.