The opening detector is a magnetic contact that you can use to secure doors and windows. Unauthorized opening is detected and reported to the alarm center. The opening detector consists of a magnetic contact (reed) and a magnet. These are attached either parallel, at the front or orthogonally to one another - at a maximum distance of 13 mm. The circuit of this NC opening detector is closed in idle state. If the distance between the reed and the magnet increases, the circuit is interrupted and an alarm is reported. The optimal installation location is the middle of your door or window frame. Installation on the lower window frame is also possible if a specific window needs to be tilted with the magnetic contact secured. The detector is suitable for both surface and flush-mounting. The opening detector is available in white and brown. Sales unit: 1 ST.