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System Sensor Europe has published a free 12-page guide analysing the conditions and restrictions associated with using projected beam smoke detectors to protect large areas with high ceilings.
BS5839 Part 1 limits the mounting height of point detectors for life protection to 10.5m,or 15m for property protection.Beam detectors are less affected by the dissipation of the smoke as they sample across the entire smoke plume,so are ideally suited to high ceiling applications.
This is also reflected in BS5839 Part 1,which permits the use of beam detectors up to heights of 25m,for life protection,and 40m for property protection.
Another benefit of beam detectors is their lower cost,both in original equipment and maintenance - a single beam detector will cover an area that would require some 16-point detectors.
System Sensor's new addressable and conventional 6500 devices have the unique Asuretest remote test capability,
which exercises both the optical path and the electronics.As Asuretest checks the entire alarm path,it is an acceptable alternative to the smoke test normally required for point detectors.
