Some glass break detectors listen for the sounds of breaking glass, while others detect the impact of an attack on the glass. Motion Detectors sense an intruder's movement, regardless of how he got inside. Security systems often include a way to bypass the motion detectors while you're inside so you can arm the perimeter of your home, yet move freely about inside without setting off your alarm. Some motion detectors are designed to ignore small pets. Control Panels are the heart of security alarm systems.
Control panels monitor all of the various sensors, checks the keypads, and sounds the sirens.
A rechargeable battery powers the system for several hours during power failures. While there are many types of products available on the market, the actual system you purchase can be either hard wired or wireless. The difference is that for hard wired systems there is a wire connecting each device to the central control panel. A skilled installer uses special tools to conceal the wire inside walls, attics and crawl spaces. Higher quality wireless systems use frequent test signals to verify the operability of each transmitter.