Seco-Larm SM-205Q/W Surface-Mount Closed-Loop Magnetic Contact Sensor

The Seco-Larm SM-205Q/W is a surface-mount closed-loop magnetic contact designed for professional life-safety and perimeter intrusion detection applications. As a commercial-grade component from Seco-Larm's established security hardware line, it is suited for doors, windows, and access points where reliable magnetic sensing is required. Its surface-mount form factor simplifies installation on a wide range of frame and panel materials without requiring mortising or recessing, making it a practical choice for retrofit and new-construction security projects alike.

Key features & benefits

• Surface-Mount Design — Engineered for straightforward installation directly onto door or window frames, eliminating the need for recessed routing and reducing installation time in both new and retrofit applications.
• Closed-Loop Operation — Operates on a closed-loop circuit principle, a widely accepted approach in professional intrusion detection that provides immediate fault indication if the circuit is cut or tampered with.
• Magnetic Contact Technology — Utilizes magnetic actuation to monitor the open or closed state of a protected entry point, providing reliable, contact-free sensing with no mechanical wear over time.
• Commercial Security Application — Positioned within Seco-Larm's professional security component catalog, making it appropriate for integration into commercial alarm and access control panel systems.