Single/surface-mounted opening indicator VdS B (white) For reliable outer skin protection For securing doors and windows For installation and installation Description The installation and installation of opening detector is a magnetic contact with which you can secure doors and windows. Unauthorised opening is detected and reported to the alarm control panel. The opening detector consists of a magnetic contact (reed) and a magnet. These are attached either parallel, on the front or orthogonal to each other - at a distance of 13 to 25 mm. The circuit of this NC opening detector is closed in idle mode. If the distance between reed and magnet increases, the circuit is disconnected and an alarm is reported. The detector is protected from sabotage. The optimal installation location is the center of your door or window frame. Mounting on the lower window frame is also possible if a certain window is to be tilted when a magnetic contact is secured. The detector is suitable for both surface and