MC38 Surface Mount Wired NO Door Sensor Magnetic Reed Switch White A compact, surfacemount magnetic reed switch designed for reliable door and window openclose detection. The MC38 uses a normally open contact that closes when the magnet is brought near the switch, making it suitable for wired alarm panels and simple circuit monitoring. Key benefits Simple detection: provides a clear open or closed signal for security systems and monitoring circuits. Easy to install: surfacemount form factor fits on doors, windows, frames, and cabinets without recessed cutting. Compatible with wired systems: twowire design works with most alarm panels, control boards, and DIY electronics that accept a NO input. Discreet appearance: white, lowprofile housing blends with most door or window frames. Reliable switching: magnetic reed mechanism gives stable contact action for basic security and sensing applications. Main attributes Function: Normally open (NO) magnetic reed switch for door and window status detection. Mounting: Surface mount format for quick installation on many frame types. Wiring: Wired twoconductor connection for direct integration with alarm panels and controllers. Material: Plastic housing with internal reed contact and magnet arrangement. Performance: Designed for lowvoltage, lowcurrent switching typical of alarm and monitoring systems. Practical applications Home or office security: Monitor doors and windows as part of a wired intrusion detection system. Cabinet and equipment access: Detect unauthorized opening of cabinets, server racks, or tool boxes. Automation and DIY projects: Provide a simple magnetic input for controllers, timers, and custom alarm circuits. Installation tips Position the magnet and switch so the gap specified by your system yields a consistent open or closed state. Route the two wires to your control panel following the panel wiring recommendations for normally open sensors. Test the sensor after mounting to confirm reliable contact closure when the magnet is aligned. Model reference MC38 surface mount wired NO door sensor magnetic reed switch, white. This device offers a straightforward, lowprofile solution for adding basic contact sensing to wired security and monitoring installations.