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VESDA is an Early Warning Aspirating Smoke Detection (ASD) System capable of detecting very low levels of smoke at a very early stage (a.k.a. incipient stage) of a fire. With a successful global history of over 25 years, VESDA has been widely accepted in various mission critical industries and bears approvals from worldwide fire regulatory institutions.
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Product Overview
Reference List
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HOW VESDA WORKS
VESDA works by continually drawing air into the pipe network via a high efficiency
aspirator. A sample of this air is then passed through a dual stage filter. The first stage
removes dust and dirt from the air sample before it allows the sample to enter the
laser detection chamber for smoke detection. The second (ultra fine) stage provides
an additional clean air supply to keep the detector’s optical surfaces free from
contamination, ensuring stable calibration and long detector life.
From the filter, the air sample is passed through to the calibrated detection chamber
where it is exposed to a laser light source. When smoke is present, light is scattered
within the detection chamber and is instantly identified by the highly sensitive
receiver system. The signal is then processed and presented via a bar graph display,
alarm threshold indicators and/or graphic display. The VESDA detectors are able to
communicate this information to a fire alarm control panel, a software management
system or a building management system via relays or a High Level Interface (HLI).
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