When purchasing a burglar alarm you need to think in terms of a full burglar alarm system rather than just an alarm bell box. A typical system is made up of a number of component parts which each have a vital role.
There are two basic types of alarm system, namely wired and wireless. Wired systems obviously use wires to connect the component parts, and the installation of such wired systems tends to be undertaken by a professional. Manufacturers of wired alarm systems will undertake a survey of your home and interview with you to assess your home security needs. They will then supply you with a quote. It is important to obtain quotes from at least two reputable firms before making your decision. Make sure they answer all of your queries and questions regarding the system.
Wireless systems can be purchased in DIY/hardware shops and can be installed by a householder. If you are considering purchasing a wireless system it is important to know what the component parts are and what they do – especially if you are considering installing the system yourself. All wireless alarm systems will come with a manual, and you should read this thoroughly.
The most important component is the control panel, which is also the power source for the alarm system. In a wireless system this is the only wired connection, from the control panel to the household power supply. Most control panels come with a back up battery in the case of power failure or if the unit is unplugged.
Installation choice will depend on whether or not the system is to be a monitored one. This is because monitored alarm systems send a signal to an alarm-receiving centre via a telephone line when the alarm is activated. The control panel for a monitored alarm will need to be connected to a telephone line as well as a power supply.
Next is the security keypad, this is where you enter the passcode to activate and deactivate the system. Some keypads are built into the control panels and some are separate. The keypad is a direct link to the control panel so you control the alarm system via the keypad. This is normally placed near the main entrance of the premises for easy access to avoid false alarms. Some keypads also come with a voice feature allowing you to communicate directly with the alarm-receiving centre.
An alarm system will also come with keyfobs. These are small portable electrical devices containing electronic chips which will only work on your system. The keyfob can be used to activate or deactivate the system by holding it up to the keypad – like locking or unlocking a car. It is advisable to give keyfobs to at least two trusted people who live locally so that your system can be quickly deactivated in the case of a false alarm.
An alarm system will also have sensors. This includes door and window sensors that trigger the alarm when opened and glass-break sensors triggered by the shockwaves of breaking glass. If an intruder does get into the home then motion detectors (often known as Passive Infrared Motion Sensors or PIRS) will sense their movement and trigger the alarm.
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