Update: 2020-05-08 14:17 Source: LUFTMY
Dust concentration in the air, the higher the more serious air pollution, we put the environment air has the equivalent diameter of 2.5 micrometers or less aerodynamics of particulate matter called pm2.5 particles, compared with the coarser of atmospheric particulates, pm2.5 particle size is small, the area is large, activity is strong, easy to attach to the poisonous and harmful material such as heavy metals and microbes, is very harmful to human body.PM2.5 dust enters the body through the respiratory system and directly affects the lungs.In addition, small particles can even enter the blood and other organs directly.The average person breathes about 10,000 litres of air a day, and when the air contains pollutants, human health is inevitably compromised.
The harm of dust particles to human body
Meteorologists and medical experts believe that severe weather caused by fine particles is more harmful to human health than dust storms.Particles with a diameter of 10 microns or more get stuck out of a person's nose.Particles between 2.5 and 10 microns can enter the upper respiratory tract, but some can be expelled through the sputum or nasal cavity.The internal villi are blocked, causing relatively little harm to human health.However, particles smaller than 2.5 microns are one-tenth the size of a human hair and are not easily blocked.When inhaled, it goes directly into the bronchi, interferes with gas exchange in the lungs, and causes diseases including asthma, including bronchitis and cardiovascular disease.
How to use the dust sensor to monitor the dust particles
In order to prevent people from breathing in too many harmful dust particles, it is necessary to monitor the PM2.5 in the air.Dust sensors are also known as pm2.5 sensors.PM2.5 sensors can be used to measure the concentration of particulate matter, or PM2.5, in the air around us.
The working principle of PM2.5 sensor is based on light scattering principle.Particles and molecules will scatter light under the light and absorb some of its energy.When a beam of parallel monochromatic light is incident on the field of particles to be measured, it is affected by the scattering and absorption around the particles, and the light intensity decays.In this way, the relative attenuation rate of the incident light through the concentration field to be measured can be obtained.The relative attenuation rate is basically a linear reflection of the relative concentration of dust to be measured.The intensity of the light is proportional to the intensity of the electrical signal converted from photoelectricity.By measuring the electrical signal, the relative attenuation rate can be obtained, and then the dust concentration in the field to be measured can be determined.L recommend this LD11 dust pm2.5 sensor, which can monitor particles with particle size from 0.1 to 10 microns with high precision. If you want to obtain the product specification, please contact customer service.