GRI 401-B Industrial Surface Mount Switch Set, Standard Gap, Open Loop, Concealed Terminals, Brown

Secure perimeter doors and industrial enclosures with the George Risk Industries 401-B industrial surface mount magnetic contact — built to deliver reliable, low-maintenance monitoring for security, surveillance, and access control systems. The 401-B's concealed terminals provide a tamper-resistant, clean installation that speeds deployment and reduces nuisance alarms, while the 1.5" standard gap ensures consistent contact performance across heavy-use doors and gates. Constructed of steel and carrying a UL 10C fire rating, this magnetic contact is engineered for demanding commercial and industrial environments where safety and durability matter. Designed for wired monitoring, the 401-B supports both open and closed loop configurations and is available in models with side terminals or a 36" 2-conductor cable for flexible integration. Backed by a lifetime limited warranty and optional custom features like built-in end-of-line resistors, diodes, and private labeling, it’s a smart choice for systems integrators and facilities managers. Add the GRI 401-B to your security or surveillance installation for dependable door monitoring — order today or contact us for custom configuration options.

• Reliable perimeter and door monitoring with a 1.5" standard gap for consistent detection
• Concealed terminals for a clean, tamper-resistant installation that reduces false alarms
• UL 10C fire-rated steel construction for industrial durability and code-compliant safety
• Flexible wiring options (open or closed loop) and available 36" cable or side-terminal models for easy integration
• Lifetime limited warranty and customizable E.O.L. resistors, diodes, and private labeling for long-term value