Zigbee Contact Sensor

The Zigbee Contact Sensor is a two-piece magnetic sensor that reports the open or closed state of doors, windows, cabinets, and drawers to your smart home hub. It is small enough to disappear on a window frame, reliable enough to trigger critical automations, and battery-powered so it installs anywhere without wiring. The value of a contact sensor emerges in the automations it enables. A front door opening after midnight triggers an alert to your phone. The medicine cabinet opening logs a timestamp for elderly care. The main entry door closing arms the security system. Wardrobe lights turn on the instant the door swings open. A window left ajar for thirty minutes sends a reminder before you leave. None of these require cameras or complex motion detection — just the simple binary of open and closed, reported instantly over Zigbee. Powered by a single CR2032 coin cell with low-battery reporting, it mounts with adhesive or screws. The host unit measures just 40 by 26 by 13 millimetres — genuinely unobtrusive on any frame or surface. It communicates over Zigbee 3.0 to your coordinator, where automation rules translate state changes into actions. Part of a broader sensor ecosystem that gives your home awareness without complexity.