The glass break detector is keeping a plane glass-area within a maximum radius of 2 m under surveillance. The glass break detector must be pasted at the pane of glass with glueset from LOCTITE (Accessories). A surveillance of structure-glass is not possible. Also it is not allowed to use the glassbreak-detector on wired glass or security-glass, because the wire netting and the plastic-foil are damping the mechanical oscillations. The detectors can be used in combination with the interface unit, GB-5000-IN, in bigger installations where you have to consider power consumption. It is possible to connect up to 20 detectors to one interface unit. Secondary Packaging: 25 Units