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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 150 millimetres (6 in) in diameter and 25 millimetres (1 in) thick, but shape and size vary. Smoke can be detected either optically (photoelectric) or by physical ...
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.
Diagram of where to put smoke alarms. The top caption reads "PLACE ONE SMOKE ALARM ON EVERY FLOOR AND SLEEPING ROOM". The top diagram is labeled "MULTI-STORY" with an attic, basement, two bedrooms, a living room, and a kitchen. The bottom diagram is labeled "SINGLE LEVEL" and has similar rooms. Suggestions for smoke alarms are diagramed. Date
A carbon monoxide detector or CO detector is a device that detects the presence of the carbon monoxide (CO) gas to prevent carbon monoxide poisoning. In the late 1990s Underwriters Laboratories changed the definition of a single station CO detector with a sound device to carbon monoxide (CO) alarm. This applies to all CO safety alarms that meet ...
Manual fire alarm activation. An activated manual call point in Japan. Telephone jacks are visible beneath the open cover. Manual fire alarm activation is the process of triggering a fire alarm through a call point, pull station, or other device. This usually causes the alarm to sound the evacuation signal for the relevant building or zone.
Smoke detector 1. part of a fire alarm system that detects and signals presence of smoke 2. self-contained household device for same purpose as (1) but with its own noisemaking device. Smoke ejector Powerful fan for moving large amounts of air and smoke as part of ventilation task while fighting fire
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