GRI 250-36 Industrial Overhead Door Switch, Wall Mount, Closed Loop, 2-1/2" Gap

Protect heavy-duty overhead doors with dependable, industrial-grade monitoring from George Risk Industries. The GRI 250-36 Industrial Overhead Door Switch is a magnetic contact designed for high-traffic applications—loading docks, manufacturing bays and secured facilities—where durability and reliable security integration matter most. Its extruded-aluminum housing is engineered to shield the internal reed switch from extreme forces (tested to withstand crushing loads up to 20,000 lb), while hermetic sealing and plated contacts prevent sticking or freezing in adverse conditions.

Designed for straightforward integration with alarm panels and access control, the 250-36 features a 2.5" standard gap, a normally-open (N.O.) contact, and a 36" #22 AWG stainless-steel armored cable for secure, tamper-resistant wired connectivity. Rated for DC operation and built for commercial installation, it supports surveillance and monitoring systems that require reliable door status signals. Optional built-in E.O.L. resistors and supervisory loops simplify alarm wiring and diagnostics.

Specify the GRI 250-36 for industrial door monitoring and security applications—add to your system or contact us for custom configurations and volume quotes.

• Industrial-grade door monitoring that reduces downtime and false alarms for warehouses and loading docks
• Crush-resistant extruded-aluminum housing protects the reed switch under heavy traffic (tested to 20,000 lb)
• 36" stainless-steel armored cable and hermetically sealed contact deliver dependable wired security and surveillance integration
• 2.5" standard gap and plated contacts resist sticking or freezing for reliable performance in harsh environments
• Simple screw-terminal installation with N.O. contact, optional built-in E.O.L. resistors and a lifetime warranty for long-term value