Door contact this device simply lets the alarm control panel know if a door is open or closed. They come in all shapes and sizes to suit the door/window and frame to which they are being fitted and have an operational gap from 15 up to 60mm dependant upon type. These are nearly always fitted to external doors in the premises, but can be fitted to any door or window that requires security.
The Passive Infra-Red sensor. Well when used correctly these detectors are in invaluable asset to any alarm system, they detect movement of heat, by looking at the room in Infrared. The detector lens splits the room up into 20+ areas and basically any movement of heat between these areas will cause an-activation.
- The QUAD, is basically two Standard PIR detectors working together in one unit. The effect is much better reliability as both the detectors need to trigger at the same time.
- The Dual-Tech, this is two different technology detectors built into the same unit. You get the benefits of a standard PIR (Passive infra Red) sensor and also a microwave movement-sensing device. False alarms are almost impossible with these detectors. They simply don't trigger unless something has moved. These detectors work great even in the harshest of conditions, such as a garage or shed or harsh environments where the environments they are protecting can change on a daily basis.
- The Tri-Tech, the same as a dual tech but with an inbuilt pressure sensing device. These detectors take up 2 separate zones on your alarm control panel and are the only single device that is currently approved to allow a confirmed activation in any one area by means of triggering both control panel zones when the two individual detector types have been triggered. Just 1 of these sensors is usually enough in the average home when combined with other detector types, as the pressure-sensing device can have a very large range.
Beam Detector is best used when detecting movement across larger areas. They typically have ranges from 20 meters up to several hundred meters. They normally have separate transmitter and receiver units, and movement is detected by something crossing the beam
Break Glass Detector Ideal for usage in areas were there are a lot of windows or conservatories. These detectors are really single room devices
Smoke detectors are an invaluable addition to any Alarm System so long as they are correctly placed. Most houses would perhaps only need a couple (one in the Hall, and one on the Landing). Heat Detectors are perhaps best situated in the Kitchen, and possibly the lounge.
Vibrating sensor or shock sensor quite simply this device detects shocks, and is used to detect an attempted break in by forced entry. The idea is that the shock sensor detects any vibration caused by the intruder trying to gain access and triggers the alarm system.
