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Magnetic Door and Window Contacts

Posted by Bob Bulmer on Thu 20th March 2008 at 06:00 AM, Filed in Security

A house alarm system can be upgraded to include sensors that detect the opening of doors and windows.

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This can be achieved by fitting a magnetic switch. One part is fitted to the frame the other to the door or casement.

The magnetic contacts are triggered when moved i.e. by opening the door or window. The circuit is broken and the alarm is triggered.

This is particularly handy at defeating the opportunist burglar.

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