The detector includes a separate controller device which enables engineers to commission, observe and sustain from floor level. Detection selection is 70 m with the common device, increasing to 140 m or 160 m Together with the addition with the medium or very long-variety reflector kits. The FSP-951 photoelectric detector’s https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/