GRI 400WG 400 Series Industrial Surface Mount Switch Set, 3-1/4" Wide Gap, 10W, 160VDC, 0.40A, Closed Loop, N/O, and Concealed Screw Terminals, Gray

Built for industrial and commercial security, the George Risk Industries 400WG magnetic contact delivers tamper-resistant, dependable door monitoring for alarm, access control and surveillance systems. This surface-mount switch set features concealed screw terminals and a closed-loop normally open (N/O) contact to reduce tampering and ensure consistent signal integrity to your control panel. With a wide 3.25-inch gap, the 400WG handles heavy steel doors and misaligned frames common in warehouses, loading docks and manufacturing facilities, reducing the need for custom brackets.

Designed for installers and security professionals, the 400WG accepts standard wired connectivity and includes spacers and mounting hardware to speed deployment. Rated for industrial power conditions and built from durable steel, it supports continuous monitoring environments and integrates seamlessly with existing alarm and surveillance infrastructure. Backed by a limited lifetime warranty, it’s a low-maintenance choice for long-term protection. Add the George Risk Industries 400WG magnetic contact to your next security project for reliable gap tolerance and tamper-resistant performance — order now or contact us for application guidance.

• Tamper-resistant concealed screw terminals reduce vandalism and false alarms for secure installations
• Wide 3.25-inch gap accommodates heavy steel doors and uneven frames, simplifying retrofits and new installs
• Closed-loop N/O contact provides reliable monitoring for alarm and access control systems
• Surface-mount design with included spacers and hardware speeds installation and minimizes downtime
• Durable steel construction and lifetime limited warranty deliver long-term reliability for commercial and industrial sites