George Risk Industries M-100-W Magnetic Contact Screw Mount

Product Description

The George Risk Industries M-100-W is a screw-mount magnetic contact designed for use in door and window security sensing applications. Measuring 0.25 inches by 0.375 inches by 2 inches, this compact white-finish unit mounts directly to door frames, window sashes, or enclosure surfaces using standard screws. The M-100-W is sold individually and is a common component in low-voltage security, access control, and alarm systems. Installation requires no special tooling and is suited to electricians and alarm technicians working in residential or light commercial environments.

This magnetic contact is used wherever a surface-mount reed switch assembly is needed to detect the open or closed state of a door, window, or access panel. The white finish blends with standard interior trim and painted surfaces. It is well suited for residential security system installations, commercial access control panels, and building automation sensor loops where a screw-mount profile is preferred over recessed or adhesive-mount alternatives.

Key Features

• Screw-mount design allows secure, tool-accessible installation on wood, metal, or plastic surfaces
• White finish integrates cleanly with standard interior door and window trim
• Compact form factor at 0.25 x 0.375 x 2 inches suits tight frame and sash clearances
• Sold individually for single-point replacement or new installation
• Designed for low-voltage security and alarm sensing circuits

Compatibility

Designed as an OEM-style replacement or new-install component for surface-mount magnetic contact applications in residential and light commercial door and window security systems.

Installation Notes

Installation is typically performed by a licensed electrician or certified alarm technician. De-energize the security or alarm loop circuit before wiring or replacing the contact. Align the magnet and switch halves within the manufacturer-specified gap tolerance to ensure reliable actuation. Follow applicable NEC low-voltage wiring guidelines and local building codes when routing and terminating sensor wiring.