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There is no
doubt that homes and other buildings are less
likely to be broken into if they have
professionally fitted alarm system. Most
burglars are on the lookout for easy pickings,
so an alarm is a good deterrent.
Don’t forget that an alarm is only a 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. |
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How does an alarm work?
Alarms systems come in all shapes and sizes, however, no matter
how complex a system may be, it can always be broken down into
the following basic components.
Detection Devices
Most alarm systems have at least two types of detection device.
The most commonly used are:-
Magnetic contacts - 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 Infra-red Receivers - commonly referred to as PIR’s they
are generally fitted into the corner of a room and look for
changes in temperature, such as an intruders body heat.
Microwave detectors are often combined with PIR's to reduce
false alarms.
Control
This is where you switch the system on and off, usually by
entering a security code or using a key fob or passive device.
The control equipment monitors the detection devices, and if
necessary activates the signalling device.
Signalling
Audible alarms - these comprise of a bell or siren fitted to the
outside of a building to attract attention and frighten off
intruders.
Monitored alarms include a telephone connection to a 24hour
central monitoring station, whose operators can contact your
keyholders or may be able to notify police if your alarm
activates. An annual fee is charged for this service.
And finally
There are some unscrupulous alarm companies, some of them will
tell you they are police approved or that when the alarm is
activated the police will respond, check with your local police
and always obtain at least three competitive quotations. If
contacted by telephone, never reveal details of your security
arrangements. Ensure that the installed alarm is fitted and
maintained to the relevant standards in your country. Companies
should offer a 24 hour service with a guaranteed 4 hour response
to emergency call-outs.
It is advisable to select a company that belongs to a recognised
trade association. I have heard many horror stories of people
being charged a thousand pounds or more for a burglar alarm. A
good burglar alarm, fitted by a reputable company shouldn’t cost
you more than £500.00. For further information and advice,
contact your local crime prevention officer at the major police
station in your area. That call could save you a lot of cash!
Standards to look for
EN 50131
BS4737 for wired alarms
BS6799 for wireless alarms |
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