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Intruders fear detection, making light and sound excellent deterrents to unwelcome visitors. With an increase in the availability and reliability of battery-operated alarm systems, installing them yourself is now easy and quick. This section deals with issues of security in the home as well as issues of safety.
Installing an Alarm System
The vast majority of alarm systems use sensors to detect movement or magnetic contact plates that set off the alarm when parted. The most commonly used sensors are called passive infrared detectors (PIRs), which detect the movement of a heat source. The most important thing to consider when installing alarms is the positioning of these sensors, so that they can monitor all the necessary zones in your home.
PIR Positioning Tips
Security House Plan
A sensor is placed at each access point to your house, which divides the area into zones. This lets you see at a glance where a zone has been breached, or where some maintenance is required. Front, back, and patio doors, windows, and fire escapes should be considered, although you may decide that some windows are inaccessible.
Remember that pets will have to be kept out of zones when the alarm is on unless you buy a system that can detect them by being sensitive to size. When you purchase an alarm it's worth checking for any extra features such as a panic button, or anti-tamper safeguards for sensors and the control panel.
Typical zone layouts: Along with PIRs (passive infrared detectors) and magnetic contact plates, other less common devices are pressure pads, and vibration detectors for doors and windows. PIR movement detector; back door; magnetic contact detector.
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Sunday, July 27, 2008 13:35 PST