Security Alarms Intruder or Burglar Alarms
Government statistics show that the risk of burglary after installing a home burglar alarm is greatly reduced. It should also be noted that where burglar alarms are fitted and entry is made, the time spent inside the premises is also significantly shortened. So, you know alarms work as a deterrent - unless you're one of those people who moan that 'No one takes any notice of alarms'. Wrong
- Firstly, the intruder takes notice. Every burglar would rather break into an un-alarmed property than one fitted with an alarm.
- Secondly, your neighbours will notice - just because it is a nuisance.
- And thirdly, it is quite easy to fit an automatic dialler which will telephone pre-programmed mobile or land-line numbers and deliver event specific messages and allow you to listen-in to any noise being made in the property.
Types of Intruder Alarms
All intruder alarms comprise three main parts;
- Detector(s)
- Control Panel
- Signalling Device(s)
The three parts are conventionally connected by multicore cables (hard-wired) and recently by wireless (radio) connections. Systems can also be built using both types of connection.
Types of Detectors
Detectors are designed to provide a signal on detection of a particular event; e.g a person moving in a room or a door opening. This event signal is sent to the control panel which is programmed to respond in a particular way on receipt of the signal. The commonest situation is when the alarm is in a set state and the signal is used to trigger an audible alarm.
There are three main types of detectors available in both hard-wired and wireless types:
- Physical switches - magnetic contacts are an example.
- Space detectors - Passive Infra-red (PIR) devices are an example.
- Vibration (shock) sensors.
Any combination of these detectors can be built into any one system.
Types of Control Panels
This section deals with hard-wired Control Panels, wireless Control Panels are explained below. There are two main types of Control Panels;
- Stand-Alone
- Blank End-station
Stand-Alone
Stand-Alone Control Panels are self contained units where the method of seting/unsetting the alarm (keypad/switch) is built into the Control Panel. Most Stand-Alone control Panels have the facility to connect one or more Remote Keypads (RKPs) to allow setting/unsetting from a remote location.
Blank End-station
Blank End-station Control Panels have no on-board means of operating the alarm system, instead they are set/unset and programmed using one or more Remote Keypads (RKPs)
Types of Signalling Devices
There are methods of signalling that an alarm has occurred;
- Audible - usually internal or external sounders.
- Visible - strobe lights are usually incorporated in the sounder.
- Communication - this can be through a speech dialler, to a monitoring station, or over an internet connection.
NJM Electrical are registered installers of Texecom Alarm Systems, Winner of the PSI Magazine Premier Award for "Product of the Year 2008 - Intruder Alarm"
If you require advice or a free quote regarding Intruder Alarm Systems then please contact us at;
Our Huddersfield based electricians and electrical contractors cover all areas of Huddersfield, Honley, Meltham,Slaithwaite, Marsden, Holmfirth, Shepley, Wakefield, Halifax, Bradford, Leeds, Brighouse, Oldham, Barnsley, Sheffield and all of West Yorkshireand Yorkshire.
NJM Electrical, 447 New Mill Road, Brockholes, Huddersfield, HD9 7EF. Copyright © by NJM Electrical All Right Reserved. Published on: 2009-11-01 (730 reads) [ Go Back ] |