Resideo 7939WG-WH MPS20 Surface Mount Magnetic Contact with Terminals, 1-1/4" Gap, SPST, White

Protect doors and windows with dependable, easy-to-install sensors designed for professional security and monitoring systems. The Resideo 7939WG-WH MPS20 surface mount magnetic contact provides reliable wired security monitoring for both residential and commercial installations. Its SPST (Form A) reed switch and 1-1/4" (32 mm) standard gap deliver consistent contact closure for intrusion detection and surveillance, while the 300mA at 30VDC contact rating supports common alarm panel inputs.

Installer-friendly features — including concealed screw terminals with a snap-on cover, spacers, and mounting screws — make for fast, tidy deployments and allow the EOL resistor to be hidden for a clean finish. The low-profile white housing blends into door and window frames and minimizes visual impact in retail, office, and home environments. Compatible with a wide range of wired security systems and replacements for legacy models, the 7939WG-WH helps maintain continuous monitoring with minimal maintenance.

Add the Resideo 7939WG-WH MPS20 magnetic contact to your next project for reliable intrusion sensing and professional-looking installs—order now or contact sales to specify for doors and windows.

• Reliable door and window protection that integrates seamlessly with wired security panels, reducing false alarms and simplifying monitoring.
• Surface-mount design with concealed screw terminals and cover for a neat, professional installation in residential or commercial sites.
• 1-1/4" standard gap and SPST (Form A) reed switch deliver consistent contact performance for intrusion detection and surveillance applications.
• Includes magnet, spacers, cover and mounting screws to speed up installation and minimize field adjustments.
• Durable, low-profile white housing with a 300mA @ 30VDC contact rating for dependable long-term operation in low-voltage security systems.