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   “ Fine particles are also called fine particles, fine particles PM2.5。 Fine particles refer to those in ambient air aerodynamics Equivalent diameter ≤ 2.5 micron Particulate matter. It can be suspended in the air for a long time. The higher its concentration in the air, the more serious the air pollution. ”From Baidu Encyclopedia.

With the accelerated process of modernization, improper development strategies inevitably cause air pollution, which not only affects the vision from a visible perspective, but also increasingly erodes people's health from an invisible perspective. Many people often see the term "pm2.5 burst" in the news and other network channels, which is only roughly understood as air pollution, but they lack a further rational and accurate understanding of the causes, standards and hazards of a data. In short, pm2.5 is the particulate matter suspended in the air. One of its natural sources is forest fires, sandstorms, volcanic eruptions and other natural disasters, and the other is human production and living activities. In the human category, the causes of particulate matter are more subdivided, including vehicle exhaust emissions, cooking, smoking, etc.

The following is the distribution of 24-hour average standard values from Baidu Baike according to the new air quality standard of PM2.5 detection network:

The size of the outer package is one of the fastest arrived express deliveries received recently.

Choose a contrast object whose size is more intuitive for girls.

Basic parameters.

The white background mirror display screen is very simple.

Dimension comparison is shown in the figure.

Imitation wood grain decoration on the side.

The instructions are small and clear.

Wire power supply.

Cute boot screen, saying that you look a little similar to the letter software of a penguin that you tore?

Wang showed great curiosity about this new member,

The mirror is very beautiful, and it is easy to be blind.

Pull the curtains a little stronger.

List of APP interfaces.

I don't know why it suddenly went offline and ignored me.

Pm2.5, temperature and humidity can be displayed.

Tap the white round button on the top once to switch between time and pm2.5 value,

Double click to detect the air quality in real time.

The weather forecast of the day shows that the pm2.5 value is about 160,

Several measurements show that the indoor air quality is about 90 and the outdoor air quality is about 110. It can be seen that the air quality in the residential area is good, which may be attributed to greening.

The following is a list of measurement conditions on the same day when the weather forecast indicates that the pm2.5 value is 70.

Enclosed room.

Open interior.

Balcony.

Corridor.

In the elevator.

In the garage on the ground floor.

Outdoor.

aisle.

As can be seen from the above picture, the pm2.5 value in the detection environment is lower than the weather forecast,

It may be because the community is relatively remote.

Postscript summary

Among the common sense of the general public, 360 is a company dedicated to virtual products such as network security. In this event, we received 360's products in the field of air detection. We were a bit surprised. The 360 Wifi products we have been using during our study, but this time it seems that we are ready to enter the daily life of the military and the people. Conscience products are very supportive of continuing research and development. Look at the description of 11 years of research and development in the introduction, and express our admiration. The birth of a good product is absolutely inseparable from a large amount of time and dedication of a group. Air detection is still a relatively new field in China. It can also be said that it is an industry driven by the environment. At present, there is no product on the market that can be measured accurately to a great extent, but the product with a small error value is enough for ordinary families. After all, the accuracy is basically proportional to the price. I don't know how long this product will last. After browsing some data, we know that the accuracy of the measurement sensor will decline after a period of use and needs to be replaced. What is the time range. If the price is too high, it is not cost-effective for some users to purchase air purifiers directly. The cost of the laser sensor should not be low.

The following is the use of this air monitor.

Advantages: portable, the measured data is in line with the facts, the display screen is exquisite and silent.

Disadvantages: The size is too large and too thick to be portable, the mirror reflection is serious, the angle between the display screen and the placement surface is completely vertical, which is inconvenient to watch, there is no built-in battery, and the wood like pattern is a little lacking in texture.

Finally, I wish the product more and more perfect.