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2. The Best Place to Put Your Smoke Detector (Plus 3 Spots ... - AOL

   www.aol.com/lifestyle/best-place-put-smoke...

   Replace smoke detectors at least every 10 years: Don't place your life in the hands of an outdated smoke alarm. For the most part, you can plan on replacing your smoke detector at least every 10 ...

3. Aspirating smoke detector - Wikipedia

   en.wikipedia.org/wiki/Aspirating_smoke_detector

   An aspirating smoke detector (ASD) is a system used in active fire protection, consisting of a central detection unit which draws air through a network of pipes to detect smoke. [1] The sampling chamber is based on a nephelometer that detects the presence of smoke particles suspended in air by detecting the light scattered by them in the chamber.

4. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   Ionization smoke alarms can quickly detect the small amounts of particles produced by fast-flaming fires, such as cooking fires or those fueled by paper or flammable liquids. A newer type of the smoke detector is the photoelectric smoke detector. It contains a light source, which is positioned indirectly to the light sensitive electric sensor.

5. Fire alarm notification appliance - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_notification...

   A fire alarm notification appliance is an active fire protection component of a fire alarm system. A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action. Audible appliances have been in use longer than any other method of notification.

6. Why It Might Not Make Sense To Buy ADT Inc. (NYSE:ADT) For ...

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7. 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.