Large, wide area indoor spaces present a challenge to traditional fire safety systems: in order to effectively detect smoke over such a space, complex networks of multiple overlapping sensors are required. An alternative is optical beam smoke detectors, which are designed specifically for such situations - one single unit installed on a wall can detect smoke over an area of up to 1500m~2 (BS 5839). More coverage per detector means fewer detectors, with associated reductions in the time and cost of installation and wiring, as well as a lesser aesthetic intrusion. Mounting on the wall (as opposed to the ceiling) enables convenient access for maintenance, and a low-level controller further speeds and eases the process. A space that might need as many as 15 point detectors could therefore be maintained from one single low-level controller, instead of organising height access to 15 different spots.
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