Schmersal BN-31 10Z Magnetic Proximity Switch

Schmersal BN 31-10Z Magnetic Reed Switch is a compact, magnetically actuated sensor from the BN 31 family that switches state in response to an external magnet, making it suitable for safety interlocks, door detectors, and position sensing on machinery. This magnetic reed switch variant is offered with 1.5 m or 3.0 m cable lengths (Art.-Nr. 101057203 and 101057204, respectively), providing flexible integration with enclosures and guard interfaces. For reliable operation, the device should be mounted on iron with a non-magnetic layer at least 20 mm thick, and the actuating orientation is defined by the housing symbol; when pairing switches and actuators, ensure the magnet poles align with the color coding: red for S and green for N. The BN 31-10Z designation identifies this 10Z variant within the BN 31 family, delivering a passive sensing element suitable for straightforward, durable detection where a magnet actively triggers the switch without requiring power in the sensing action.