NF S61-960-31/IN1*NF EN 54-31/IN1:2016 Fire detection and fire alarm system - Part 31 : multi-sensor fire detectors - Point detectors using a combination of smoke, carbon monoxide and optionally heat sensors
2016NF S61-960-31/IN1*NF EN 54-31/IN1:2016 Fire detection and fire alarm system - Part 31 : multi-sensor fire detectors - Point detectors using a combination of smoke, carbon monoxide and optionally heat sensors