GRI 4510A Concrete Concealed Switch, 1/2" Gap, Open/Closed Loop, SPDT, Reed Form, 5W

When overhead doors must be monitored in busy warehouses or industrial yards, the G.R.I. 4510A concrete concealed switch provides a robust, tamper-resistant solution. This George Risk Industries magnetic contact is engineered to be recessed into concrete so forklifts and heavy vehicles can pass over it without damaging the sensor. The 4510A features stainless steel construction and a 3' (36") stainless armored cable, delivering corrosion resistance and mechanical protection for dependable security and surveillance performance.

The SPDT (Form C) reed switch supports both open and closed loop monitoring, making it easy to integrate with alarm panels, access control systems, and building management platforms. With a recommended 1/2" operational gap and a wide working range, it accommodates slightly misaligned or worn commercial doors while maintaining accurate monitoring. Ideal for overhead door monitoring, loading docks, and perimeter security, the 4510A reduces false alarms and maintenance costs. Add the G.R.I. 4510A to your security design for rugged, low-profile door sensing—contact sales or order now to improve your facility monitoring.

• Protects overhead door contacts from forklifts and heavy traffic by recessing the switch into concrete for uninterrupted facility operations
• Durable stainless steel body and 3' stainless armored cable resist corrosion and mechanical abuse for long-term reliability
• SPDT (Form C) reed switch supports both open/closed loop monitoring for flexible integration with alarm and access control systems
• Designed with a wide working gap and 1/2" recommended operational distance to accommodate worn or misaligned commercial doors
• Low-profile, concealed installation minimizes tampering and preserves floor surfaces while enabling discrete perimeter and door monitoring
• Backed by a lifetime limited warranty for reduced downtime and lower total cost of ownership