The Glass Breakage Sensor is An INPUT DEVICE which is triggered by the sound of breaking glass. This is the perimeter protection for the windows or glass or and other buildings. The glass break sensor is usually installed on glass doors and windows and glass walls. The glass break sensor operates on the principle that when the glass door or glass window or glass walls break by the intruder shock or hit, It will detect the glass breakage frequency, then triggers a signal to alarm system. The glass breakage sensor is popular and widely used because they detect an intruder before he enters the protected premises.