Magnetic Contacts

How A Wireless Burglar Alarm System Works

Wireless security alarm systems are ideal for installation in a home that wasn’t wired for an alarm system when it was built. Motion sensors, door contacts and window contacts can all be wireless, and not need to be hardwired back to the main control panel. Even the control keypad can be wireless. The various wireless components use RF (radio waves) to transmit their signals back to the main control panel. The only real disadvantage compared to wired systems is that the wireless components run on batteries, which will need to be replaced once in a while. These batteries generally last for years, however, and many alarm companies offer service and maintenance plans that will cover the replacement batteries and the installation of them.

The most common wireless alarm components are the following:
Control Panel
This is essentially the “brains” of the alarm system. It’s usually mounted somewhere out of the way, like a closet or the basement.
Keypad
The keypad is used to arm and disarm the system, as well as change various settings. It’s usually located somewhere near the entrance door for easy access.
Magnetic Switches
These contacts are used to monitor windows and doors. They’re made up of a switch that attaches to the window or door and a magnet that is mounted on the frame.
Motion Sensors
Motion sensors can be mounted in large rooms or areas like hallways.
Video Cameras
Wireless security cameras can send a video feed back to a monitor and/or a VCR in the house.
Remote Keys
Remote keys are much like the remotes you get with car alarms. They can be used from a distance to arm or disarm the alarm, as well as things like turning lights on or off or unlocking doors.

The article was written by someone who used to work in an immigration agent. He’s now started his business in roof repair and building inspection. You can also consult him with the information about home security.

Interm project video: magnetic contact demo

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