GRI 8484-TWG-B 1" Steel Door Recessed Switch Set, Wide Gap, 10W, 160VDC, 0.40 Amp, Closed Loop, N/O, A, Brown

Designed for dependable perimeter protection and access control, the George Risk Industries 8484-TWG-B recessed magnetic contact provides reliable closed-loop monitoring for steel doors in commercial and industrial security systems. This 1" diameter steel door switch is built for heavy-duty use, offering a wide 1" standard gap tolerance and a Form A (N/O) contact that handles up to 160VDC and 0.40A, with a nominal 10W power rating. The unit’s self-locking recessed mount and screw terminal termination streamline installation to reduce labor time and eliminate extra connectors or soldering. A built-in end-of-line (EOL) resistor simplifies panel wiring and improves tamper detection, making it ideal for integration with alarm panels, access control, and surveillance systems. Finished in brown to blend with common door frames, the GRI 8484-TWG-B is UL/ULC listed and backed by a lifetime warranty for long-term performance. Choose this George Risk recessed magnetic contact when you need a low-profile, code-compliant door sensor that reduces install costs and improves monitoring reliability — perfect for retrofit or new-security installations.

• Low-profile recessed design delivers discreet, tamper-resistant door monitoring for commercial security and access control
• Wide-gap, 1" standard gap and steel construction ensure reliable contact on heavy steel doors and frames
• Closed-loop N/O contact with built-in EOL resistor simplifies wiring and integration with alarm panels and monitoring systems
• Self-locking mount and screw terminals cut installation time and reduce labor costs for installers
• UL/ULC approvals and lifetime warranty provide code compliance and long-term reliability for mission-critical security applications