Photoelectric smoke alarms are smoke detectors that use changes in a beam of light as an indicator of fire. These sensitive smoke detectors are ideal alarms for homes for the detection of slow fires that burn at low temperatures, such as mattresses and furniture fires, or fires that lurk beneath carpets and curtains. A photoelectric sensor is also included in dual sensor smoke alarms and alarms for fires that are specialty smoke alarms designed to react to multiple types of fires. Any type of home alarm or be located in any establishment, must be checked at least twice a year to ensure that it operates correctly. The inner workings of a photoelectric smoke alarm includes a (LED) light-emitting diode and a small sensor that is calibrated to register the subtle changes in the beam of light created by the LED. Under normal conditions, the light stays clear and stable. When there is smoke in the air particles, the beam of light goes dark. Depending on the photoelectric smoke sensor detector style lee light that is scattered as a result of the conditions of smoke or register a sudden darkness on the beam.

When sensors photoelectric smoke detectors recorded particulate in the air, they triggered a strong alarm that will sound noticeably. The sound indicates that you should leave the area or pay attention to the source of the smoke that is causing alarm. In some cases, photoelectric smoke alarms can be triggered by the smoke of the kitchen, incense, or similar conditions, in which case the alarm can shut down and restart. While photoelectric smoke alarms are a large fire safety tool, it is important to remember that fire extinguishers at suitable places in the House kept fully charged to make sure that small fires can be turned off.