Armory Sponsor
Posted: 1/19/2011 9:21:11 AM EDT
| Why is there a need for individual window or door alarms if you have a motion detector covering the area where the door or window is located? Seems to me the motion detector would cover it. |
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1 The guy has to get into your house before the alarm trips.
2 With both you can be at home, disable the IRs and still have the windows and doors protected. You should also have glass break detectors as well as contact switches on all the doors and windows. Some newer houses are just siding, styrofoam and drywall and it is easy to cut a hole through a wall. They can even cut through the roof. No mater how your house is made, you need the motion sensors. |
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Think about setting up different types of protection zones.
For example, you can have a "perimeter zone" that is separate from an "interior zone". That way, you can still have break-in protection for an occupied house while permitting you or your family to get a midnight snack from the kitchen without setting off the alarm. |
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The reason you put contacts on openings is to let you know they are closed. In larger applications such as a warhouse a rear door can be left open by employees smoking for example. In a home a window or door can be left open. It happens. I have put contacts on safes so the don't forget to close them.
The motion detector is the trap. In many cases they break the glass and open the window. |
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