Why is photoelectric technology better than other products?    Photoelectric technology is fast and reliable.  Photoelectric technology detects smoldering fires much faster than ionization.  The FireArrest™ photoelectric alarm can detect a fire at its earliest stages of smoldering to help prevent potential damage and injury.  Photoelectric technology also 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.