The FST-951R intelligent addressable detector from Honeywell NOTIFIER options stage ID functionality that permits Each individual detector address to become set with rotary address switches to supply actual detector spots. The FSP-951 photoelectric detector’s exceptional optical sensing chamber is engineered to sense smoke produced by a variety of combustion sources. https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/