Why are FireArrest smoke alarms less likely to false alarm?    Photoelectric technology reduces the likelihood of false alarms.  The photoelectric sensors in FireArrest alarms analyze the air in your home every 9 seconds.  They distinguish between everyday household particles and those that indicate the presence of a real fire.  Photoelectric alarms are reliable enough to practically eliminate false alarms. Photoelectric alarms compared to regular store-bought ionization detectors are less prone to false alarm when sensing the presence of small particles such as dust and cooking fumes. Built in drift compensation extends the life of the detector between cleanings. Detectors signal the base-station when they require maintenance with the patented CleanMe 8signal.