Definition of PM2.5
PM2.5 refers to the particulate matter in the ambient air with an aerodynamic equivalent diameter less than or equal to 2.5 microns. Also known as fine particles, particles that can enter the lungs. Its diameter is less than 1/20 the thickness of a human hair. Can be suspended in the air for a long time. The higher its content (concentration) in the air, the more serious the air pollution. Although PM2.5 is only a small component in the earth’s atmosphere. But it has an important impact on air quality and visibility. PM2.5 has small particle size, large specific surface area and strong activity. It is easy to be accompanied by toxic and harmful substances (for example, heavy metals, microorganisms, etc.). And the residence time in the atmosphere is long, and the transportation distance is long. The pm 2.5 detector can detect fine particles.
Definition of PM10
PM10 is an inhalable particulate matter with an aerodynamic equivalent diameter of 10 microns or less. Refers to the general term for solid and liquid particles floating in the air. PM10 can enter the upper respiratory tract, but part of it can be excreted through sputum. In addition, it will be blocked by the villi inside the nasal cavity.
The source of PM2.5/PM10
The main source of PM2.5 is the residues emitted from combustion in the process of daily power generation, industrial production, and automobile exhaust emissions. Most of them contain toxic substances such as heavy metals. In addition, there are some volatile organic compounds. PM10 is directly emitted from pollution sources, such as chimneys and vehicles. Others are fine particles formed by the interaction of sulfur oxides, nitrogen oxides, volatile organic compounds and other compounds in the ambient air. PM10 usually comes from motor vehicles running on unpaved asphalt or cement roads, material crushing and grinding processes, and dust raised by the wind. In order to ensure human health. Need to use pm 2.5 detector to monitor the concentration of PM2.5/PM10.
Application of pm 2.5 detector
The PM2.5 dust sensor uses the principle of optical scattering. Obtain the concentration of particulate matter. PM2.5/10 particulate matter sensor application field. Air conditioners with purification functions, air purifiers, on-board purification equipment, portable detectors, fresh air systems, intelligent detectors, etc. In response to the country’s call to win the blue sky defense war. Atmospheric grid micro-stations and online dust monitoring stations have been widely used. Particulate matter sensor is an indispensable device for dust monitoring. Grid monitoring of the atmosphere and online monitoring of road dust. Air quality monitoring in outdoor public places plays an important role.