Description Photoelectric alarms are generally more effective at detecting slow, smoldering fires that smolder for hours before bursting into flame. Sources of these fires may include cigarettes booming in couches or bedding. Photoelectric alarms are generally more effective at detecting fast, flaming fires that consume combustible materials rapidly and spread quickly, Sources of these fires may induce flammable liquids or paper burning in a waste container. However, both types of alarms proved adequate detection of both types of fires. smoke alarm EN approval fire alarm stand alone smoke detector
