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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.
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.
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.
In 1984, the company acquired Apollo Fire Detectors, the largest manufacturer of smoke detectors in the UK. [ 5 ] The company undertook three acquisitions in the second half of 2019, including Ampac, another fire detection business, and two further acquisitions in the medical sector in early 2020.
Not too long later in March 2018, Kidde recalled their 2 Dual-Sensor Smoke Detector models, PI9010 and the PI2010. [32] The reason for the recall was a yellow cap left on one of the sensors that could fail to alert buyers of the alarm of a possible fire. 452,000 units in the US and about 40,000 units in Canada were affected in the recall.
The panoramic sight is used to observe and aim targets effectively. A high-definition color camera with zoom is used for daylight operations, while a thermal sight with 3 μ to 6 μ detector is used for night vision operations. [8] The Sabrah can launch fire on fixed and mobile targets due to the dual-axis line of sight stabilization.