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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.
The rechargeable batteries were often replaced by a pair of AA batteries along with a plastic shell encasing the detector. The photoelectric (optical) smoke detector was invented by Donald Steele and Robert Emmark from Electro Signal Lab and patented in 1972. [15] In 1995, the 10-year-lithium-battery-powered smoke alarm was introduced. [10]
Optical beam smoke detector; Q. Q2B; S. Smoke detector This page was last edited on 28 January 2024, at 05:24 (UTC). Text is available under the Creative ...
Optical beam smoke detector; Oxygen mask; P. Partial stroke testing; Passenger service unit; Personal Egress Air Pack; Personal flotation device; Pin Index Safety System;
In dwellings, smoke detectors are often stand-alone devices. In non-domestic buildings, fire detection will typically take the form of a fire alarm system, incorporating one or more of the following automatic devices: Heat detector; Smoke detector; Flame detector; Fire gas detector
Replace smoke detectors at least every 10 years: Don't place your life in the hands of an outdated smoke alarm.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 ...
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