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  2. Smoke detector - Wikipedia

    en.wikipedia.org/wiki/Smoke_detector

    Smoke detector mounted on a ceiling. A smoke detector is a device that senses smoke, typically as an indicator of fire.Smoke detectors/Alarms are usually housed in plastic enclosures, typically shaped like a disk about 125 millimetres (5 in) in diameter and 25 millimetres (1 in) thick, but shape and size vary.

  3. Optical beam smoke detector - Wikipedia

    en.wikipedia.org/wiki/Optical_beam_smoke_detector

    An optical beam smoke detector is a device that uses a projected beam of light to detect smoke across large areas, [1] typically as an indicator of fire. [2] They are used to detect fires in buildings where standard point smoke detectors would either be uneconomical [3] or restricted for use by the height of the building. Optical beam smoke ...

  4. Here's Everything You Need to Know About Smoke Alarms - AOL

    www.aol.com/heres-everything-know-smoke-alarms...

    Once you have fixed your smoke alarm you should check your carbon monoxide alarm as well to make sure it’s in order, or use this travel hack to keep your house safe and sound while you are away ...

  5. Fire alarm system - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_system

    Fire alarm systems are required in most commercial buildings. They may include smoke detectors, heat detectors, and manual fire alarm activation devices (pull stations). All components of a fire alarm system are connected to a fire alarm control panel. Fire alarm control panels are usually found in an electrical or panel room.

  6. How to reset a smoke alarm that won’t stop beeping - AOL

    www.aol.com/reset-smoke-alarm-won-t-205535790.html

    $19.99 at Amazon . If you have a hard time remembering to replace your smoke alarm’s battery each year, the Kidde Smoke Detector can help. Its 10-year lithium battery doesn’t need to be replaced.

  7. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    Normally, light from the light source shoots straight across and misses the sensor. When smoke enters the chamber, it scatters the light, which then hits the sensor and triggers the alarm. Photoelectric smoke detectors typically respond faster to a fire in its early, smoldering stage, before the source of the fire bursts into flames.