NC Wired Magnetic Contact Sensor Reed Switch for Metal Window Pack of 10 Overview A set of ten normally closed wired magnetic contact sensors designed for metal window applications. Each unit uses a reed switch to detect window opening and closing and connects to standard wired alarm panels that accept NC contacts. Key benefits Reliable intrusion detection: Normally closed wiring provides a clear open or closed signal to wired alarm systems, reducing ambiguity during an alarm event. Designed for metal windows: Intended for installations where metal frames or sashes are present and traditional surface magnets may be difficult to use. Economical multipack: Ten identical sensors make it easy to protect multiple windows or keep spare units on hand for maintenance. Simple integration: Works with most wired alarm control panels and security systems that accept NC contact inputs. What this product does Detects the opening or closing of a window using a reed switch and a magnetic actuator. Sends a wired NC contact signal to the security panel or monitoring device when the circuit is opened. Provides a discrete and dependable contact for perimeter security zones. Key attributes Function: Normally closed (NC) wired magnetic contact using a reed switch. Compatibility: Intended for wired alarm systems that accept NC contact inputs and for installation on metal window frames or metal sashes. Quantity: Pack of 10 sensors, suitable for multiple locations or replacements. Performance: Reed switch design offers stable switching behavior for reliable contact status reporting. Installation: Wired connection to alarm panel inputs; suitable for mounting where metal substrates are present. Practical applications Ground floor residential windows: Use multiple sensors to secure windows on the lowest level and integrate them into a home security panel. Commercial storefronts with metal frames: Protect metalframed display windows and service openings by wiring sensors into the existing alarm system. Garages and metal gates: Monitor access points with metal components where a dedicated metalfriendly contact is preferable. Installation tips Verify the alarm panel accepts NC inputs before wiring. Position the sensor and magnet so the reed switch closes when the window is in the secured position. Keep wiring runs tidy and protected from damage; follow standard electrical and local code practices for alarm wiring. What you get Ten NC wired magnetic contact sensors suitable for metal window applications. Pack provides multiple units for comprehensive perimeter coverage or spares for routine maintenance. This product is a practical choice when you need multiple wired magnetic contacts designed for use on metal windows and straightforward integration with standard NC alarm inputs.