Low Frequency (520Hz)
Sounders, Sounder Strobes, Sounder Bases

Low Frequency Sounders and Sounder Strobes are the first notification appliances to meet the new NFPA 72®2010/2013 low frequency requirements effective January 1, 2014 for all commercial and certain residential sleeping spaces. The Low Frequency Sounder bases meet the new NFPA72® 2010/2013 low frequency requirements as well as the new NFPA 720® 2012 carbon monoxide low frequency requirements effective January 1, 2015. Studies driving these requirements have shown that a lower frequency is more effective at waking individuals in a fire event, including those with mild to severe hearing loss.

​Low Frequency (520Hz) State Code Adoption

Check the table​ for States and Regions adopting IBC 2012 Chapter 35 and IFC 2012 Chapter 80 that reference NFPA 72®:2010 or NFPA 72®:2013. Refer to your local building code or state fire marshals office for effective dates.

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No discontinued products found.

  • Discontinued Model Product Manual Data Sheet Replacement Model