High sensitivity smoke detectors

A diagrammatic representation of the Vesda aspiring smoke detection system.So-called ‘aspiring’ smoke detection devices are air sampling smoke detectors that are designed to provide the earliest warning of a potential fire and so to provide enhanced safety in diverse applications. Vesda aspiring smoke detectors reliably measure extremely low concentrations of smoke. They are used in warehousing, telecommunications and electrical facilities, mining, cold storage, manufacturing plants and power stations, as well as the healthcare and commercial sectors. The system is especially well suited to applications where unobtrusive detection is required, in art galleries, for example, modern offices and heritage buildings.

It also carries approval for use in hazardous areas (Factory Mutual Class 1 Div 2) where air quality is poor or temperatures are extreme. Duncan Boyes, chairman of the Centa Group  which specialises in fire protection, notes, “An important feature of this fire detection system is that it allows time to investigate a potential fire and to intervene if necessary, so that damage, downtime and costs caused by a fire can be avoided. The early warning alarm also gives sufficient time for the building to be evacuated.

“The multiple warning levels of the system can be used to trigger different responses at different stages of a fire, from controlling air conditioning, to suppression release.”

The system encompasses a network of pipes with small sampling holes in them, as well as capillary sampling tubes. It operates by continually drawing air into the pipe network via a high efficiency aspirator. Samples of the air are then passed through a dual stage filter before entering the calibrated detection chamber where the air is exposed to a laser light. If smoke is present, light is scattered within the detection chamber and this is instantly identified by the highly sensitive receiver system. The signal is then processed and presented graphically on a monitor.

The detectors can be linked to a fire alarm control panel, a software management system or a building management system via relays or a high level interface, so that the appropriate responses are triggered according to the indicated stage of a fire. The Vesda air sampling smoke detection system is distributed, installed and supported throughout Southern Africa by the Centa Group.

art galleries aspiring smoke detection systems building management systems commercial buildings exports fire detection and suppression fire protection equipment fire safety for high-risk installations fire safety systems healthcare facilities heritage buildings industrial facilities smoke detection systems telecommunications facilities warehouses
Previous story
keyboard_arrow_upQuality in motion
keyboard_arrow_downQuality in motion

The Vista Duo from Hillaldam Sliding Door Systems is the first bottom rolling hardware for even folding weatherproof aluminium doors

Next story
keyboard_arrow_upSupplying clean water to remote communities
keyboard_arrow_downSupplying clean water to remote communities

More than 1 200 PlayPump systems already installed in rural parts of South Africa, Mozambique, Lesotho, Swaziland and Zambia, are, with the power of children’s play, bringing clean water to about two million people. By 2010, the combined efforts of PlayPumps International  and the international organisations or individuals that fund the set-up of the PlayPump systems aim to have installed 4 000 pumps in 10 countries in Sub-Saharan Africa, making clean drinking water accessible to up to 10 million people. Expansion over the next few years will see PlayPump systems in Ethiopia, Kenya, Malawi, Tanzania, and Uganda.

keyboard_arrow_upClever solutions for modern bathrooms
keyboard_arrow_downClever solutions for modern bathrooms

Available from EDT Eurodrain KESSEL Technology Lowest installation height on the market Even easier to install Even safer to use The minimum installation height makes the Ultraflat floor drain ideal for renovation work and new construction. Characterised by its very low-profile design, the bathroom drain “The Ultraflat” has a minimum overall installation height including cover […]

keyboard_arrow_upHigh Definition Interiors boasts an unusual exterior
keyboard_arrow_downHigh Definition Interiors boasts an unusual exterior

The new building for High Definition Interiors is clad in Brownbuilt 406 profiled steel sheeting to provide a warehouse feel, while offering a sleek and clean aesthetic.

keyboard_arrow_upSika technologies aid the upgrade of The Boulevard – Cape Town
keyboard_arrow_downSika technologies aid the upgrade of The Boulevard – Cape Town

The Boulevard, situated in Woodstock Cape Town, is an upmarket commercial landmark and a popular home to both local and international tenants. This uniquely beautiful, glass building was in need of a facelift to ensure the structure was of sound integrity. The project commenced in March 2018 and was completed in June 2018. When this […]