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What is the harm of PM2.5? What is PM2.5? The role of PM2.5 sensors

Update: 2019-12-25 17:05 Source: LUFTMY

With haze becoming a hot word, air quality monitoring data, such as PM2.5, PM10, ozone, sulfur dioxide, etc., have become an important indicator to measure air pollution.

I. Harm to human PM2.5

1. Cause airway obstruction or inflammation

Our respiratory system naturally has the ability to block pollutants. Those larger pollutants have been blocked when they pass through the nose and throat. Even the dirt that can enter the trachea and bronchus can also be transported out of the respiratory tract with the movement of the cilia in the trachea. However, the human body is also full of loopholes, for small particles, the respiratory system barrier is powerless.

2, the pathogenic virus take a "free ride" into the body to cause cancer

In addition to their own "bad things", fine particulate matter (PM2.5) is like a car that can freely enter the respiratory system, other pathogenic substances such as bacteria, viruses, take a "free ride" to the depths of the respiratory system, causing infection.

PM2.5 is harmful to human health
PM2.5 is harmful to human health

3. Affect fetal development and cause defects

According to a foreign survey, pregnant women exposed to high concentration of PM2.5 were studied. It was found that high concentration of PM2.5 pollution may affect the development of embryos. More studies have found that the concentration of atmospheric particulate matter is related to the increase of perinatal and neonatal mortality, low birth weight, intrauterine growth retardation (iurg), and congenital functional defects.

4. PM2.5 (particulate matter) can enter blood vessels through the exchange of Qi and blood

From 2004 to 2006, when the daily average concentration of PM2.5 in the observation site of Peking University increased, the number of cardiovascular emergency patients in the Third Hospital of Peking University, about 4 kilometers away, also increased. "Using time series analysis and research, we analyzed the data collected and found that the concentration of PM2.5 increased by 10 micrograms per cubic meter, the number of emergency patients with hypertension in hospital would increase by 8%, and the number of cardiovascular diseases would also increase."

II. What is PM2.5?

Haze PM2.5
Haze PM2.5

In February 2013, the Chinese name of PM2.5 was named fine particle by the national science and technology terminology validation Committee. The chemical components of fine particles mainly include organic carbon, elemental carbon, nitrate, sulfate, ammonium salt, sodium salt, etc. PM2.5 refers to particles with an equivalent aerodynamic diameter of 2.5 microns or less in the ambient air. It can be suspended in the air for a long time. The higher its concentration in the air, the more serious the air pollution. Although PM2.5 is only a small component of the earth's atmosphere, it has an important impact on air quality and visibility. Compared with the coarser atmospheric particles, PM2.5 has the advantages of small particle size, large area, strong activity, easy to attach toxic and harmful substances (such as heavy metals, microorganisms, etc.), long residence time in the atmosphere and long transportation distance, so it has a greater impact on human health and atmospheric environment quality.

Air purifie
Air purifier

In haze prone cities, many residents have developed new living habits: pay attention to whether the concentration of PM2.5 exceeds the standard or air quality every day, so as to decide whether to wear a mask or cancel the original outdoor running. A precise PM2.5 detector provides you with real-time PM2.5 concentration value. A good PM2.5 monitoring equipment needs an accurate PM2.5 sensor.

III. PM2.5 sensors

LUFTMY PM2.5 monitoring sensor GDS06 sensor with an infrared light-emitting diode and a high sensitivity photoelectric receiving sensors, infrared leds emit light reflected light can be created in case of dust, photoelectric sensor by measuring the intensity of the reflected light to measure the concentration of dust in the air, sensor output PWM signals directly, the concentration of the current numerical PWM width.

GDS06 Infrared dust sensor
GDS06 Infrared dust sensor

PM2.5 sensor GDS06 has two advantages: stable detection capability and high production efficiency. The pm2.5 monitoring sensor GDS06 has the characteristics of small volume, high precision, low power consumption and short response time, etc. The pm2.5 monitoring sensor can be applied in particle counter, dust particle counter accessories, air purifier, etc.

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