Fire Detection Systems  Copy Right Protected 2013 Home About Us CCTV Systems Fire Detection Suppression Systems Access Control Other Services Contact CONVENTIONAL SYSTEMS
Conventional Fire Detection System Conventional systems are by far the most commonly used fire detection system, and the most cost effective to install. The conventional system can protect between two and sixteen detection zones, which is each limited by legislation to not exceed 2000 square meters. This system is ideal as a cost effective means for compliancy and protection of life or assets in most buildings regulated by the National Building Regulations Act 103 of 1977 (NBR). Detection zones is protected by heat or smoke detectors (as per SANS 10139), wired and connected to one cable through all devices within the zone, and terminated with an EOL resistor at the furthest point. The cable is then connected to the fire control panel on the other end. Upon activation of any of the devices, the panel will either indicate a fault condition or fire condition on the specific zone at the control panel, but will not indicate the device affected.
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Addressable System Addressable systems are more intricate than conventional systems to design, install, operate and maintain, and is also more costly than conventional systems in every way. Other than conventional systems, all devices is provided with a specific address, and can be installed on one or more cables, irrespective the zone design or allocation. Such cable will be terminated at both ends, within the fire control panel (Class A Loop) to ensure bi-directional communication and legislative compliance. An addressable system is ideal for buildings with multiple floors, multiple spaces/offices, or where staged evacuation is required. This system will also provide, either a fault or fire condition, but will specifically indicate which device was activated.
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Aspiration Systems Aspiration systems consist of one or more aspiration detectors connected to either a conventional or addressable detection control panel. The aspiration detector use a network of pre-engineered conduits to “suck” in air from the protected area, send it through a laser detection chamber, and analyse the air for smoke particles. The aspiration detector is by far the most sensitive detection device, and can thus provide an early warning long before any other device. Even though the aspiration detector is more costly to purchase, the maintenance on the device is limited to “vacuuming” the conduit network from the detector side when doing a service, and replacing the filter. The cost saving on labour between the aspiration and optical detectors when comparing required maintenance over  period as short as two or three years will make the aspiration detector the preferred choice. Furthermore, other than with other heat or smoke detectors with a life span of 10 years, the aspiration detector is not subject to a limited life span. As long as it is operational, it will work and be compliant.
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Gas Detection Gas detection for various kinds of gas is done with pre-engineered detectors connected to the conduit network of an aspiration detection system.
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