An Intrusion alarm system can help protect your house/Business by warning you of a possible intruder. It can really help you and your loved ones avoid a face to face confrontation with a burglar or criminal. If you have been thinking twice about adding a home burglar alarm to your property you should not think it a third time. These systems have many devices like Door Sensors, window sensors, glass break detectors, motion sensors that are aimed at detecting an intruder. Some of these devices detect if the burglar is trying to break open a window or door or if he is already inside the house lurking inside it.