The upgraded addressable CO detector and low frequency sounder base from Advanced is designed to meet NFPA/UL low-frequency signaling standards for sleeping areas such as hospitals, hotels and multi-occupancy residential applications. The sounder base generates a 520 Hz tone to alert occupants of a fire or CO/life-safety emergency. The sounder base has been designed for easy replacement of the CO sensor module when end of service life is reached. Complete with an on-board electrochemical sensor with three CO detection levels, full system-wide sounder synchronization and a replaceable CO module with an approximate six-year lifespan. 

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