Very Early Smoke Detection Apparatus - Dallas Fire Protection Contractor

VESDA – Very Early Smoke Detection
Apparatus / Aspirating Smoke Detection

VESDA is a fire detection system that offers
the earliest possible warning of a potential fire,
ensures business continuity and freedom from
nuisance alarms, can adapt to the ‘unique’
characteristics of any given environment,
delivers high performance through its high
quality design and its dedicated global sales
and distribution channels.

The VESDA system takes constant air
samples through 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 has the unique
feature of providing an additional clean air
supply to keep the optical surfaces within the
detector clear from contamination and to
ensure the stable calibration and long life of
the detector. From the filter, the air sample is
passed through to the calibrated detection
chamber where it is exposed to a stable
controlled 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).