The GD 330 Glass Break Detector has a relay output that can be connected directly to the input line of any control panel. It is specifically designed for the surveillance of shop-windows, glass sliding doors, standard windows and other vulnerable glass surfaces in public offices and private homes. It can be used on windows coated with security film if the detector is mounted on the glass, rather than the film. It can also be used to secure glass cabinets that protect valuable items. The detector emits an alarm signal the moment the glass breaks. It is very resistant to any irrelevant disturbance to the glass or in its vicinity. Ideal for 24-hour loop perimeter protection.