Style: Normally open Protect doors and windows with a compact, reliable magnetic contact sensor that pairs easily with most standard wired security systems. The surfacemount white housing measures 2.51 inches (64 mm) and keeps a low profile while delivering consistent open/close detection using magnetic reed switch technology. The sensor is supplied in a professional wired configuration and includes all wiring and mounting hardware for quick setup. Key benefits Versatile compatibility: Reed switch supports both NO and NC modes (Normally Open and Normally Closed) for flexible integration with a wide range of alarm panels and control systems. Simple installation: Surfacemount housing with adhesive backing for quick placement on doors or windows without drilling. Hardwired connection provides stable, tamperresistant performance. Compact, discreet design: White, lowprofile housing (2.51 inches / 64 mm) blends with most door and window frames for unobtrusive monitoring. Reliable detection: Magnetic reed switch provides consistent and accurate triggering when a protected entry is opened, reducing false reports and ensuring dependable alerts. Ready to install: Each unit ships complete with wiring and mounting hardware for fast deployment in residential or commercial settings. Important attributes Function: Detects opening of protected doors or windows and signals the connected alarm system. Style: Normally open by default, configurable for NO or NC operation. Size: 2.51 inches (64 mm) length, surfacemount form factor. Material and finish: Durable white housing designed to maintain appearance and withstand regular use. Performance: Professionalgrade wired design for longterm, stable operation and minimal maintenance. Typical applications Home entry points: Install on front doors, back doors, or sliding glass doors to monitor unauthorized openings. Business storefronts: Place on display case doors, back office doors, or retail windows to secure merchandise and sensitive areas. Facility monitoring: Use on server room doors, storage closets, or internal access points where wired, reliable detection is required. What is included One magnetic contact sensor (white, 2.51 inches / 64 mm) Wiring and mounting hardware Adhesive backing for surfacemount installation This sensor provides a straightforward, professional wired solution for door and window monitoring with flexible NO/NC operation, compact styling, and simple installation.