Update: 2020-08-31 16:10 Source: LUFTMY
With the improvement of people's living standard, many families have private cars and travel is very convenient.But the increasing number of cars in cities means that the environment will also be affected.In recent years, more and more people advocate environmental protection life, and vehicles are also more stringent in their own research and development and emission control. Automobile exhaust particulate concentration sensors are used to monitor automobile exhaust, making the detection results more accurate.
What are the pollutants in car exhaust
Automobile exhaust pollutants mainly include: carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, dust particles (PM particles), odor (formaldehyde, etc.).According to statistics, every thousand cars emit about 3,000kg of carbon monoxide, 200-400kg of hydrocarbons and 50-150kg of nitrogen oxides every day.The emissions from mobile sources such as cars in Los Angeles have accounted for 90% of the total amount of air pollutants.Car exhaust is a major contributor to air pollution.
What are the hazards of automobile exhaust to human body and environment
Particulate matter in automobile exhaust includes lead compounds, carbon particles and oil mist.Lead compounds, one of the most toxic in heavy metal pollution in the atmosphere, are derived from the antiknock additive to gasoline, an organic compound containing lead, tetraethyl lead [(C2H5)4Pb].It is about 100 times more toxic than inorganic lead compounds and spreads by vehicle and wind.It is the cause of acute mental illness of the highly toxic substances, it can accumulate in the human body, when the blood lead content exceeds 0.1mg, can cause anemia and other toxic symptoms.So the use of unleaded gasoline is now being phased in.Carbon particles are the product of incomplete combustion of fuel, and oil mist is usually caused by leakage from the tank and carburetor.
Particles larger than 10 m in diameter (1 m=10-6m) can rely on their own gravity to fall to the ground, called dust.They don't do much harm because they stay in the air for a short time and aren't easily inhaled.Particles less than 10 m in diameter can drift for a long time in the air, called dust.The biggest risk to human health was 0.5 mu m ~ 5 microns particles, this kind of fly ash can directly reach the lung cells and deposition in the lung, and into the blood stream, causing respiratory disease, they may also and SO2, NO2 and generate synergy, mucous membrane damage, lung cells, causing bronchial and lung inflammation, some patients will eventually lead to cor pulmonale.
These particles hang in the air for a long time and form aerosols with tiny water droplets, which cause haze weather.In order to reduce air pollution and strengthen emission control of automobile exhaust, monitoring equipment equipped with particulate matter concentration sensor of automobile exhaust can be used for monitoring.LUFTMY Recommended the laser particle concentration sensor module, which USES the Mie spherical particle scattering principle to measure high accuracy, small size, and has strong anti-ash performance, enabling real-time and accurate monitoring of vehicle exhaust particle concentration.