GRI MS4400-A Industrial Switch Set with High Security Magnasphere Technology, Aluminum

For high-security access points where reliability matters most, the George Risk Industries MS4400-A industrial magnetic contact delivers proven protection for doors, safes and vaults. This high-security magnetic contact uses GRI's patented Magnasphere® spherical magnet technology and a hermetically sealed electrode to resist magnetic tampering and harsh environments, providing consistent intrusion detection for surveillance and security monitoring systems. Constructed in aluminum with a standard gap of 0.38" and a 36" lead, the MS4400-A mounts easily on commercial hardware and integrates directly with alarm panels thanks to built-in E.O.L. resistor options. The spherical ball contact responds only within a restricted activation zone, reducing false trips and defeat attempts compared with conventional reed sensors — a key benefit for vaults, safes and solid-fitting doors. Backed by a lifetime warranty and U.S. manufacturing, this wired magnetic contact is ideal for security integrators, facility managers and locksmiths who need robust, low-voltage intrusion detection. Specify the MS4400-A for mission-critical perimeter protection — contact us to order or request custom lead lengths and installation guidance.

• Provides reliable, tamper-resistant intrusion detection for doors, safes and vaults to strengthen site security
• Hermetically sealed Magnasphere® design resists environmental contamination and magnetic defeat for long-term reliability
• Built-in E.O.L. resistor and diode simplify alarm wiring and monitoring integration for faster installation
• Solid aluminum housing and a compact 0.38" standard gap deliver rugged durability in industrial and high-security applications
• 36" standard lead and custom lead lengths available for flexible mounting and easy retrofit into existing systems
• Lifetime warranty and U.S. manufacture ensure quality assurance and lower total cost of ownership