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 detectors are often installed in warehouses as a cost-effective means of protecting large open spaces.[4]
^Fire and Gas Detection and Control in the Process Industry(PDF), jonhind.com, retrieved 2012-08-30
^Wide Area Detection, info4fire.com, retrieved 2012-07-17
^Todd, Colin S. (2008), The Design, Installation, Commissioning and Maintenance of Fire Detection and Fire Alarm Systems - A Guide to BS Code 5839-1, London, United Kingdom: BSI, ISBN 978-0 580 63098 9
^Fire Detection in Warehouse Facilities(PDF), The Fire Protection Research Foundation, retrieved 2012-11-14
and 26 Related for: Optical beam smoke detector information
auditoriums, opticalbeam or projected-beamsmokedetectors are used instead of a chamber within the unit: a wall-mounted unit emits a beam of infrared...
efficiency, and other useful systems. An active electronic motion detector contains an optical, microwave, or acoustic sensor, as well as a transmitter. However...
the concentration of smoke particles becomes higher. Optical obscuration. A light beam is passed through the smoke and a detector opposite measures the...
e.g. "hotboxes" (overheating bearings) would smoke or glow red. By the 1940s, automatic defect detectors included infrared sensors for hotboxes, wires...
pair with a moving stream of smoke or vapor in the laser beam's path"). Sound pressure waves cause disturbances in the smoke that in turn cause variations...
A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. A gas detector can sound an alarm to operators...
communication (UVC) as a result of recent progress in solid-state optical sources/detectors operating within solar-blind UV spectrum (200–280 nm). In this...
by paper or flammable liquids. A newer type of the smokedetector is the photoelectric smokedetector. It contains a light source, which is positioned indirectly...
particulates by employing a light beam (source beam) and a light detector set to one side (often 90°) of the source beam. Particle density is then a function...
An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other. Such fibers find wide usage...
between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most common...
points and automatic fire detectors according to different measuring principles (smokedetectors, heat detectors, fire gas detectors ...). Product group "other...
rangefinders. Then it alerts the crew and can start various countermeasures, like smoke screen, aerosol screen (e.g. Shtora), active laser self-defence weapon with...
studied. Optical coherence tomography uses Michelson interferometry with a distance adjustable mirror. Coherent light passes through a beam splitter where...
Response time The response time is the time required for the detector to respond to an optical input. A photon absorbed by the semiconducting material will...
manufacturing. There are three different useful types: opposed (through-beam), retro-reflective, and proximity-sensing (diffused). A self-contained photoelectric...
the detector set up to the side of the light beam. More light reaches the detector if there are many small particles scattering the source beam than...
Light-Emitting Diodes as Spectrally Selective Detectors, Applied Optics, 31, 33, 6965-6967, 1992. F. M. Mims III, Aerosol Optical Depth, Ultraviolet-B and Total Sky...
a rectifying detector such as a crystal detector or electrolytic detector, along with the radio signal from the antenna. In the detector the two signals...
detector). He developed an improved detector to pick up this unknown "extra current" based on his new microphone design (similar to later detectors known...
operation of his galena crystal detector in his lectures. A friend in the US persuaded him to take out a US patent on his detector, but he did not actively pursue...
transparent again in the so-called infrared and optical window frequency ranges. In a microwave beam directed at an angle into the sky, a small amount...
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