R/sir, On which sciencetific principle smoke detector & heat detectos, flame detector syste?m work? Purohit
From India, Mumbai
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6From India, Mumbai
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Dear,
The smoke detectors have a sensor that detects smoke when it enters the smoke detector device. It then transmits a signal to the fire alarm panel, triggering the alarm siren. The same process applies to flame detectors.
From India, Pune
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The smoke detectors have a sensor that detects smoke when it enters the smoke detector device. It then transmits a signal to the fire alarm panel, triggering the alarm siren. The same process applies to flame detectors.
From India, Pune
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Dear Purohit,
Very rightly said by KSS that a smoke detector has a sensor with signal rays in it. These signals get disturbed or terminated when smoke enters it. However, it is different for heat detectors or flame detectors.
These detectors contain a small glass tube filled with a liquid (normally special wax) that has a limit of heat toleration capacity. As soon as the temperature of the wax increases and crosses that toleration level, the tube bursts and the alarm sounds. The same principle is being used in sprinklers too.
Regards,
Inderjeet Singh, "Born to lead"
From India, Rajsamand
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Very rightly said by KSS that a smoke detector has a sensor with signal rays in it. These signals get disturbed or terminated when smoke enters it. However, it is different for heat detectors or flame detectors.
These detectors contain a small glass tube filled with a liquid (normally special wax) that has a limit of heat toleration capacity. As soon as the temperature of the wax increases and crosses that toleration level, the tube bursts and the alarm sounds. The same principle is being used in sprinklers too.
Regards,
Inderjeet Singh, "Born to lead"
From India, Rajsamand
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A smoke detector is a device that detects smoke, typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue a local audible or visual alarm from the detector itself.
Smoke detectors are typically housed in a disk-shaped plastic enclosure about 150 millimeters (6 in) in diameter and 25 millimeters (1 in) thick, but the shape can vary by manufacturer or product line. Most smoke detectors work either by optical detection (photoelectric) or by physical process (ionization), while others use both detection methods to increase sensitivity to smoke. Sensitive alarms can be used to detect, and thus deter, smoking in areas where it is banned such as toilets and schools.
Smoke detectors in large commercial, industrial, and residential buildings are usually powered by a central fire alarm system, which is powered by the building power with a battery backup. However, in many single-family detached and smaller multiple-family housings, a smoke alarm is often powered only by a single disposable battery.
From India, Bhubaneswar
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Smoke detectors are typically housed in a disk-shaped plastic enclosure about 150 millimeters (6 in) in diameter and 25 millimeters (1 in) thick, but the shape can vary by manufacturer or product line. Most smoke detectors work either by optical detection (photoelectric) or by physical process (ionization), while others use both detection methods to increase sensitivity to smoke. Sensitive alarms can be used to detect, and thus deter, smoking in areas where it is banned such as toilets and schools.
Smoke detectors in large commercial, industrial, and residential buildings are usually powered by a central fire alarm system, which is powered by the building power with a battery backup. However, in many single-family detached and smaller multiple-family housings, a smoke alarm is often powered only by a single disposable battery.
From India, Bhubaneswar
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Optical detection is made by a photodiode. A photodiode is a type of photodetector capable of converting light into either current or voltage, depending upon the mode of operation. The common, traditional solar cell used to generate electric solar power is a large area photodiode.
Photodiodes are similar to regular semiconductor diodes except that they may be either exposed (to detect vacuum UV or X-rays) or packaged with a window or optical fiber connection to allow light to reach the sensitive part of the device. Many diodes designed for use specifically as a photodiode use a PIN junction rather than a p-n junction to increase the speed of response. A photodiode is designed to operate in reverse bias.
From India, Bhubaneswar
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Photodiodes are similar to regular semiconductor diodes except that they may be either exposed (to detect vacuum UV or X-rays) or packaged with a window or optical fiber connection to allow light to reach the sensitive part of the device. Many diodes designed for use specifically as a photodiode use a PIN junction rather than a p-n junction to increase the speed of response. A photodiode is designed to operate in reverse bias.
From India, Bhubaneswar
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