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Thursday, February 24, 2011

Home Alarm Systems


Alarm systems come with the following options:


* Standard for all systems, the hidden control panel, with its power source, is the brains of the system and is connected to all other components, including one standard phone line.



* A security keypad is also standard and designed for easy arming and disarming. For convenience, the keypad tells you whether your system is armed correctly or not. For an additional cost, you may have additional keypads installed.
* PIR (Passive Infrared) Detectors, commonly known as motion detectors, use sensors to detect changes in infrared energy levels in the form of heat and motion. Typically, they are installed high up on walls, or over doors or windows. Look for sensors that meet American National Standards Institute and SIAC standards. Installers should be certified with The National Burglar & Fire Alarm Association and/or by state.



* Door and window contacts are magnetic devices placed along door jambs and window frames to trigger the armed alarm system if doors or windows are opened. Some systems include a chime that goes off whenever a door or window has been opened—very useful if you have young children with the urge to explore the great outdoors.

* Audio discriminators are sensors that convert the acoustic shock waves of glass breaking into an electrical signal that sets off the system.



For More: http://www.hometips.com/buying-guides/home-alarm-system-options.html

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