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photoelectric smoke fire detector

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  • Smoke detector — A smoke detector is a device that detects smoke, typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue a… …   Wikipedia

  • smoke detector — an electronic fire alarm that is activated by the presence of smoke. Also called smoke alarm. [1925 30] * * *       device used to warn occupants of a building of the presence of a fire before it reaches a rapidly spreading stage and inhibits… …   Universalium

  • Gentex — (NASDAQ|GNTX) is a company specializing in fire protection and automotive products based in Zeeland, Michigan, USA. Fire protection Gentex was founded in 1974 by Fred Bauer as a manufacturer of fire protection products. The company created the… …   Wikipedia

  • Burglar alarm — Silent alarm redirects here. For the album, see Silent Alarm (album). Burglar (or intrusion), fire and safety alarms are all electronic today. Sensors are connected to a control unit via a low voltage hardwire or narrowband RF signal which is… …   Wikipedia

  • Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… …   Wikipedia

  • Ionizing radiation — consists of highly energetic particles or waves that can detach (ionize) at least one electron from an atom or molecule. Ionizing ability depends on the energy of the impinging individual particles or waves, and not on their number. A large flood …   Wikipedia

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