Seco-Larm SM-217Q/W Miniature Surface Mount NC Contact Alarm Sensor

The Seco-Larm SM-217Q/W is a miniature surface-mount magnetic contact designed for intrusion and alarm applications. Configured as a normally closed (NC) contact, it is intended for use in commercial and professional security installations where a low-profile, surface-mounted door or window sensor is required. As a genuine Seco-Larm component, it fits within broader access control and perimeter protection systems where reliable, consistent contact switching is essential.

Key features & benefits

• Normally Closed Configuration — The NC contact configuration ensures the circuit opens upon separation of the magnet and switch, providing immediate alarm signaling when a door or window is breached.
• Surface-Mount Design — Engineered for surface installation, the SM-217Q/W can be mounted directly onto door and window frames without the need for recessing, simplifying installation across a wide range of door and window types.
• Miniature Form Factor — The compact miniature profile allows discreet placement in applications where aesthetics or space constraints are a consideration.
• Professional-Grade Security Component — Sourced from Seco-Larm, a recognized manufacturer in the professional life-safety and security industry, supporting reliable long-term use in commercial installations.