There is no doubt that homes and other buildings are less likely to be broken into if they have professionally fitted alarm systems. Most burglars are on the lookout for easy pickings, so an alarm is a good deterrent.

Don't forget that an alarm is only part of good security. Physical protection, including locks, lighting and 'good housekeeping' are also very important factors that all contribute to making your property an unattractive prospect for thieves.

How does an alarm work?

No matter how complex a system may be, it can always be broken down into the following basic components

• Detection - movement sensor, door contacts, pressure mat.
• Control - the 'brains of the system', control panel/keypad.
• Signalling - internal sounder, external sounder, remote monitoring.

Detection

Most alarm systems have at least two types of detection device. The most commonly used are:

• Magnetic contact - which consist of a magnet fitted to the opening part of a door or window and a switch fitted to the frame. When the two parts are separated (when the door or window is opened) the alarm is activated.
• Passive Infa-red receivers - commonly referred to as PIRs, they are generally fitted onto the corner of a room and look for changes in temperature, such as an intruder's body heat.

Control

This is where you switch the system on and off, usually by entering a security code. The control equipment monitors the detection devices, and if necessary activates the signaling device.

Signalling

• Audible alarms - these comprise of a bell or siren fitted to the outside of the building to attract attention and frighten off intruders.
• Monitored alarms - include a telephone connection to a 24 hour central monitoring station whose operators can contact a key holder or may be able to notify police if your alarm activates. An annual fees is charged for this service.

Alarm Company Vetting

If contacted by telephone, never reveal details of your security arrangements. Ensure that the installed alarm is fitted and maintained to British Standard specifications.

 

 

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