Classes of smoke alarms The smoke alarms are ideal alarms for homes since it is the place most prone to present/display situations of emergencia by the smoke, these alarms work like detectors of smoke thanks to different types from sensors located in their interior. The majority works through projected rays of light in small sensors that when to perceive the presence of smoke in the atmosphere, the light beams are interrupted and bringing about the sound of the alarm. The installation of alarms of smoke in each floor of the house is important to improve and to guarantee the security of its inhabitants. Detectors of smoke of double sensor exist to detect fires and the presence of smoke, are the more effective alarms for fire of the market since not only it detects dense smoke but also small presences like the untimed fire, fire in the kitchen, among others types of fires. The photoelectric smoke alarms, work solely when detecting changes of light by the smoke in their sensor; the sensible detectors of smoke to the light are ideal like alarms in the home since they detect fires to low imperceptible temperatures and like fires in the curtains, mattresses, among others. Source: Note of Press sent by sucrepr..