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Passive Infrared Motion Sensors

Posted by Bob Bulmer on Tue 25th March 2008 at 06:00 AM, Filed in Security

Passive infrared motion sensors are the key to most burglar systems.

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They are often fitted at ceiling height in order to maintain a wide coverage of any particular room. Each sensor is calibrated to trigger the alarm through changes of temperature within their field of detection.

Pretty hard to beat if you’re a burglar....

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