Internal-combustion engines produce carbon monoxide. A faulty current generator might release exhaust emissions in the bilge, which is extremely dangerous for people on the boat.The CMD-6 microprocessor-controlled alarm detects the levels of CO. The TWA (Time-Weighted Average) CO measurements process constantly monitors all CO levels (concentration, time and temperature) to calculate the precise alarm point depending on the COHb %.- New-generation electrochemical sensor that reduces false alarms. Ultra-low current draw (1mA). Approx. 7-year end of life.- Multiple detectors can be interconnected.- Relay module included for generator shutdown.