The Schmersal BN 20-2RZ-M16 is a high-reliability, non-contact magnetic reed switch designed for safety monitoring applications. Housed in a robust, M16 threaded thermoplastic enclosure, this sensor is ideal for monitoring the position of sliding, hinged, or removable safety guards in industrial environments. It operates on a non-contact principle with a coded magnet actuator (sold separately), reducing wear and tear and ensuring a long service life. The switch features two normally closed (NC) reed contacts and is sealed to an IP67 protection rating, making it resistant to dust and water ingress.