Photo Inductive Smoke Detectors What You Can't Know About Fire Alarm Equipment Working Principles

Working principle: The working principle of the photo-inductive smoke detector is that a photo-sensing electrode generates electrical signals under the irradiation of laser light. When the fire smoke shields the laser, the electrode loses power and an alarm signal is issued. At present, the more commonly used advantage, Beida Jade Bird, Nite and so on, the principle is basically the same.

Optical Inductor Smoke Detector The infrared light emitting element and the photosensitive element (photon receiving element) of the point-type photo-electric smoke detector are usually biased in their detection chamber. The distance between the two is ~20-25mm. In a normally smoke-free monitoring state, the sensitive element does not receive any light, including the light emitted by the infrared light emitting element. When the smoke particles enter the detection room. The light emitted by the infrared light emitting element is scattered or reflected by the smoke particles onto the photosensitive element, and when a sufficient light signal is received, a fire alarm is issued. This fire detection method is generally referred to as smoke scattering light method.

The linear beam smoke detector is usually composed of separately installed, aligned infrared emitters and light receivers; its working principle is to use smoke to reduce the amount of light emitted from the infrared emitter to the infrared light receiver. Fire, this method of fire detection is commonly referred to as smoke reduction.

Optical inductance in terms of practical use. The difference between the two is that point-type photo-electric smoke detectors are suitable for buildings with small spaces. It is suitable for rooms with a ceiling height of 12m or less, with a detection area of ​​60-80m2. The linear beam smoke detector is suitable for buildings with high ceilings and large spaces. The maximum detection distance is 100m; the maximum installation distance is 14m. The maximum protection area is 1400m2. The protection area of ​​a linear beam smoke detector is equivalent to the protection area of ​​18 point photoelectric smoke detectors. It is especially suitable for detecting smoldering fires at the ground.

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