| Item Description | Smoke detector using tyndall effect detection of smouldering fires and flaming fires with smoke development without radioactive sources detection of areas up to 60 M2 transmission of alarms and alive signals via DUPLINE® operating voltage supplied by DUPLINE® bus optional use of the smoke detector as alarm device for other detections such as gas, water and burglary via DUPLINE® battery backup if the DUPLINE® connection is interrupted acoustic alarm > 85 DB constant monitoring of sensor sensitivity via DUPLINE® for ceiling mounting NO battery back-up |