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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. It monitors
the signals from all the wireless components, and triggers the alarm
(and a call to the monitoring station if the system is monitored) if
any of the sensors detect an intrusion.
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. If the
switch and magnet are separated (the window or door is opened or
broken) it will trigger the alarm.
Motion Sensors
Motion
sensors can be mounted in large rooms or areas like hallways. They will
detect motion - and in some cases body heat - and trigger the alarm if
it is out of the acceptable range.
Video Cameras
Wireless
security cameras can send a video feed back to a monitor and/or a VCR
in the house. They can be used to monitor outside areas that are not
very visible from the street, as well as a way of seeing who is at the
door before opening it.
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...
John Lenaghan writes about
home security systems and other related topics on the Home Security Guide website. For more information visit
http://www.home-security-guide.com
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