Contact us on 07974 234289
Security alarm systems are installed to guard properties and to prevent break-ins all over Londonderry. Statistics indicate that they are a significant deterrent to criminals, and can limit criminal activity even if there is an intrusion. Home security alarms consist of a combination of detectors placed near doors and windows and motion sensors, but the latter should never be the primary sensor as it cannot detect intrusions outdoors. The basic components of a home security system are control panel, keypad, siren, motion detector, door and window contacts, and a central monitoring station, which will try to inform the owner of the break in. It is also possible to add smoke detectors, glass break detectors, panic buttons, under rug pressure mats, CCTV and window alarm screens to strengthen the system. In many areas there are security companies who supply all these gadgets free provided they are given long term monitoring contracts.
There are basically two kinds of burglar alarm systems, the closed circuit system and the open circuit system. In a closed-circuit system, the electric circuit is closed when the door is shut, that is as long as the door is closed, electricity can flow through the circuit, but if somebody opens the door, the circuit gets opened, electricity won’t flow and this triggers the alarm. In an open circuit system the circuit is open and it gets completed when the door is opened and this triggers an alarm, but this is considered an inferior system as an intruder can neutralise it by cutting the wires. Vibration (Shaker) or Inertia Sensors, Passive Magnetic Field Detection, E-Field, Microwave Barriers, Micro Phonic Systems, Taut Wire Fence Systems, Fibre Optic Cable, H-Field Systems and more are used for external perimeter security. To ensure security of the interiors, you need motion detectors, which work using radar, photo or infrared sensors, ultrasonic sound waves, microwaves and also glass break and smoke detectors.
Alarm systems are basically of two kinds, the monitored and the unmonitored. A monitored system is under watch continuously and once an intrusion is detected it gives the homeowner 30 to 45 seconds to deactivate it, and if that doesn't happen, a message is sent to a central control room. Unmonitored systems rely on alarms and lights fitted at the site and neighbours are expected to inform the appropriate persons, but they should never investigate an alarm on their own. It is advisable to keep the warning lights on the side of the house facing the street. The control box of the alarm system will be wired to all the components and once an intrusion is detected it will activate sirens, flashing lights and also a telephone digital communicator, which will send out messages. The digital communicator usually calls the security company directly.
Look around and ask your friends about security alarm companies and find out about the quality of their services and how fast they will install the alarm. Determine how quickly they respond to service requests and ask for references from their customers. You can also ask them about warranties and collect quotes from at least three firms. We offer reasonable prices and reliable employees. Check with the company on how long it would take them to respond to a home alarm and whether there are any fines for false alarms. Criminals may know that the alarm is sent to remote monitoring stations through phone lines, so you must keep the phone lines securely underground, or else the alarm must be sounded via mobile phones.
Please contact us on 07974 234289 to find out what we can do for you.
Complete Security Systems
Tel: 07974 234289
57 Iniscarn Road
LONDONDERRY BT48 9RN