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Photoelectric sensor and dust sensor are used for smoke turbidity detection

Update: 2020-06-02 16:18 Source: LUFTMY Reading: ↻ News

I believe we all know that in the metal smelting, textile mills, paper mills and other industrial production often emit a large number of smoke, in addition to industrial production, the life of the car exhaust emissions, cooking kitchen smoke will pollute the air.Some of these fumes contain atmospheric pollutants such as sulfur dioxide, which when discharged into the atmosphere will cause acid rain and have direct and potential harm to human health, ecosystems and building facilities.

Photoelectric sensor and dust sensor are used for smoke turbidity detection


Hazards of soot:

About 100 million tons of soot, some of it toxic, are released into the air each year around the world.If not dealt with in time, it will not only cause damage to our living environment, but also affect human health and even life.As a result of a variety of harmful substances attached to the dust particle surface, once into the human body, will cause a variety of respiratory diseases.

Soot solid particles emitted from coal burning and industrial production are more harmful to human health than other kinds of soot.Its main components are silicon dioxide, alumina, iron oxide, calcium oxide and unburned carbon particles.Soot particles larger than 5 microns are blocked by nasal hair and airway mucus, and particles smaller than 0.5 microns usually stick to the surface of the upper respiratory tract and are expelled with phlegm.Particles with a diameter of 0.5 to 5 microns are the most harmful to human body. They not only deposit in the lungs, but also directly enter the blood and reach all parts of the body.

Therefore, reducing smoke emission and reducing smoke concentration is an important part of China's environmental protection.Monitoring dust turbidity is an effective measure to reduce dust emission.Photoelectric sensor and dust sensor can be used to monitor the dust turbidity.

Principle of measuring dust turbidity with photoelectric sensor:

The turbidity of smoke is measured by the change of light during the smoke propagation.If the smoke turbidity increases, the light emitted by the light source will be absorbed and refringed by the smoke particles, and the light reaching the photoelectric sensor will decrease. Therefore, the intensity of the output signal of the photodetector can reflect the change of the smoke turbidity.

Principle of measuring dust concentration with dust sensor:

Laser dust sensor using laser light scattering produces on the suspended particles in the air, the photoelectric detector in a certain way within the scope of collecting scattering intensity, will receive the scattering intensity linear converted into voltage, and then into a data processing system, data processing system according to the program in advance according to the mie scattering theory for data processing, it is concluded that the equivalent grain size of particles of different size particles per unit volume and quantity.

LD16 Laser PM2.5 Dust Sensor Model
LD16 Laser PM2.5 Dust Sensor Model

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