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Smoke Detector
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Specification of

Smoke Detector

A Smoke Detector or Smoke Detector is a device that detects smoke, usually as an indicator of fire. Commercial, industrial, and mass housing appliances issue signals to a fire alarm system, while household detectors, known as smoke alarms, commonly emit local sound or visual alarms from the detector itself. The smoke detector is usually placed in a disc-shaped plastic enclosure approximately 150 millimeters (6 in) in diameter and 25 mm (1 inch) thick, but the shape may vary by manufacturer or product line. Most smoke detectors work either with optical detection (photoelectric) or by physical processes (ionization), while others use both detection methods to increase the sensitivity for smoking. Sensitive alarms can be used to detect, prevent and thus, smoke in prohibited areas such as toilets and schools. Smoke detectors in commercial, industrial, and residential large buildings are usually supported by central fire alarm systems, which are powered by building power with backup batteries. However, in many one separate and smaller family multiple family homes, smoke alarms are often supported only by single disposable batteries.

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