Seco-Larm SM-206/W Recessed Normally-Closed Alarm Sensor (Pack of 10)

The Seco-Larm SM-206/W is a recessed normally-closed (N.C.) magnetic contact designed for intrusion detection and alarm applications. Recessed contacts are installed flush within door or window frames, keeping the sensor concealed for a cleaner aesthetic and reducing the risk of tampering or physical damage. As a normally-closed device, the circuit remains complete when the magnet and sensor are in proximity; separation of the two halves opens the circuit and triggers the alarm panel. This type of contact is a foundational component in commercial and residential perimeter protection systems.

Key features & benefits

• Recessed Form Factor — The recessed mounting design allows the contact to be installed flush within door or window frames, providing a discreet appearance and protecting the sensor from accidental impact or deliberate tampering.
• Normally-Closed (N.C.) Operation — The normally-closed circuit configuration is the industry-standard approach for perimeter detection, ensuring that a cut wire or loss of magnet proximity both result in an alarm condition for enhanced security integrity.
• Commercial-Grade Construction — Manufactured by Seco-Larm, a recognized name in professional security hardware, the SM-206/W is suited for integration into commercial and life-safety alarm systems where component reliability is critical.