M18 Hall Effect Magnetic Proximity Sensor, PNP/NPN, NO/NC

Magnetic proximity sensors mainly include Hall magnetic proximity sensors and magnetic reed proximity sensors. Hall sensors rely on the Hall effect to output switching signals, while reed sensors use two magnetized metal reeds sealed in a glass tube to achieve contact switching.

Hall sensors feature low power consumption, no electric shock, long service life, and high response frequency. Their epoxy-encapsulated structure allows them to work reliably in harsh environments. They are suitable for position detection in pneumatic systems, hydraulic cylinders, piston pumps, odometers, and pressure switches. Compared with inductive sensors, Hall sensors can be mounted on metal surfaces, installed closely side by side, and detect through metals. However, their performance is influenced by magnet strength and detection direction, and iron materials should not be used for mounting.

Hall magnetic proximity sensors offer significant advantages over traditional reed switches. Hall sensors use the Hall effect to generate a stable, amplified switching signal, providing longer service life, higher response frequency, and better durability in harsh environments thanks to their epoxy-encapsulated, non-contact structure. Unlike reed sensors—which rely on mechanical reed contacts—Hall sensors are more resistant to vibration, can be mounted on metal surfaces, support close side-by-side installation, and can even detect through metal. These features make Hall sensors the preferred choice for modern industrial automation and position detection applications.