GRI 7890B 1" Diameter Recessed Switch Set wit with 4.7K Resistors, Brown

Keep perimeter points monitored without compromising appearance. The George Risk Industries 7890B recessed magnetic contact is a compact, 1" diameter recessed switch set engineered for discreet door and window security. With integrated 4.7K resistors, this magnetic contact supports supervised circuits and simplifies end-of-line monitoring—helping alarm panels distinguish tamper or fault conditions from normal openings.

Designed for installers and system integrators, the 7890B combines a low-profile brown finish with rugged build quality to blend into wood frames and high-traffic entry points while delivering consistent contact performance for intrusion detection, access control, and remote monitoring. Its small diameter and flush-mount form factor reduce false activations caused by exposed sensors and enable clean, professional installations in both residential and commercial surveillance projects.

Specify the GRI 7890B when you need reliable, tamper-resistant magnetic contacts that integrate seamlessly with security panels. Order now to outfit doors and windows with compact, supervised protection for your next security or monitoring installation.

• Discreet recessed design hides the sensor for clean, professional installations and improved site aesthetics
• Built-in 4.7K resistors enable supervised circuits to reduce false alarms and simplify end-of-line monitoring
• 1" diameter compact profile fits narrow door and window frames for versatile access control and intrusion detection
• Brown finish blends with wood and dark frames to minimize visual impact in residential and commercial settings
• Reliable George Risk Industries construction delivers long-term performance for security, surveillance, and alarm systems