The VESDA VLI Intelligent Filter effectively reduces the level of pollution in the air sample before it enters the detection chamber, which dramatically extends the operational life of the detector in harsh and polluted environments. It is fully monitored, therefore it provides consistent sensitivity over the entire operation life of the detector.
The detector constantly monitors the difference between the flow of filtered air and the flow of unfiltered air into the manifold. The flow of filtered air decreases when compared to the flow of unfiltered air as first and other particles accumulate in the Intelligent Filter. Although is is recommended to replay the Intelligent Filter every tow years, environmental conditions dictate the actual frequency of Intelligent Filter replacement.