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The core component of the air environment monitoring solution --PM2.5 sensor

Update: 2021-07-14 09:51 Source: LUFTMY Reading: ↻ News

PM2.5 is known to refer to fine particulate matter in the atmosphere with a diameter of 2.5μm or less, also known as particulate matter that can enter the lungs.PM2.5 particle size is small, its diameter is less than 1/20 of the thickness of a human hair.It contains a large number of toxic and harmful substances and stays in the atmosphere for a long time and has a long transportation distance, so it has a greater impact on human health and the quality of the atmospheric environment. Although PM2.5 is only a small part of the earth's atmospheric composition, it has an important impact on air quality and visibility.

The core component of the air environment monitoring solutio

Aerodynamics refers to dust with a diameter of less than 10μm that can enter the alveolar region as respiratory dust.Dust particles with a diameter of more than 10μm are mostly deposited by impact, and most of them are deposited in nasopharynx when inhaled by human body, while dust with a diameter of less than 10μm can enter the deep respiratory tract.Most of the dust deposited in the alveoli was less than 5μm.


The global air pollution (PM2.5) is becoming more and more serious, and even seriously affects people's life and travel.In Europe, for example, when air pollution is at its peak, Paris in France even stops traffic.Singapore's air pollution is also at a record high;Air pollution in India is even worse than in China.It can be seen that the problem of improving the environment is imminent. With the environmental air quality monitoring gradually derived into the general trend of city-wide indoor air quality monitoring, various inhalable particles and gas sensors have become the core of sensing technology.The quality of sensors directly affects the final air quality monitoring values and plays a vital role in governance and control.The following Luefmai will talk to you about urban governance, environmental monitoring essential PM2.5 sensors.


PM2.5 sensor is also called dust sensor, dust sensor, can be used to detect the dust concentration in the air around us, that is, PM2.5 value size.Its working principle is developed according to the scattering principle of light, particles and molecules will produce the scattering phenomenon of light under the irradiation of light, at the same time, but also absorb part of the energy of the irradiation of light.When a beam of parallel monochromatic light incident into the measured particle field, it will be affected by the scattering and absorption around the particle, and the light intensity will be attenuated.Thus the relative attenuation rate of the incident light through the concentration field to be measured can be obtained.The relative attenuation rate can basically linearly reflect the relative concentration of dust in the field to be measured.The size of the light intensity is proportional to the strength of the electrical signal converted by photoelectricity. The relative attenuation rate can be obtained by measuring the electrical signal, and then the concentration of dust in the field to be measured can be determined.


Now, PM2.5 (fine particulate matter) sensors are widely used, and many companies have launched such sensors.The more common PM2.5 sensors on the market are divided into infrared and laser.Recently, Luftmy launched HPD05, GDS06 infrared dust sensor and LD09, LD12, LD15 and other types of laser dust sensor.

The core component of the air environment monitoring solutio

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