I believe that in every impression, the color of the sky is blue
Blue sky, white sheep......
Blue sky, blue dream......
These familiar songs all have one thing in common: blue sky
Why are blue sky mentioned?
Because the vast blue sky can make people associate themselves with many things, such as a man's mind and beautiful mood
If one day, the sky is no longer blue, how should those moving songs be interpreted?
Grey sky, hungry sheep, and deserted grassland. Is this my home?
What kind of dreams can you make in a gray sky?
Is it terrible?
In fact, has this day already arrived?
In fact, this is not just the color change of the sky.
Once upon a time, people wore masks to prevent virus infection. For example, when they caught a cold, they consciously wore masks to avoid infecting others. Now, people in a hurry can be seen everywhere on the road wearing various masks. What makes everyone feel insecure.
That is PM2.5, which is often mentioned in recent years
PM2.5 is also called fine particle 、 Fine particles 。 It refers to the particles with aerodynamic equivalent diameter less than or equal to 2.5 microns 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 in the earth's atmosphere, it has an important impact on air quality and visibility. Compared with the coarser atmospheric particles, PM2.5 is small in size, large in area, strong in activity, easy to attach toxic and harmful substances (such as heavy metals, microorganisms, etc.), and has a long residence time in the atmosphere and a long transport distance, so it has a greater impact on human health and atmospheric environment quality.
The final impact of PM2.5 is another common climate phenomenon - haze
The haze is mainly composed of sulfur dioxide, nitrogen oxides and inhalable particles, which combine with the fog to make the sky dark and gloomy. The abbreviation of particulate matter is PM. Beijing monitors fine particulate matter (PM2.5), that is, pollutant particles with aerodynamic equivalent diameter less than or equal to 2.5 microns. The particles themselves are not only pollutants, but also carriers of heavy metals, polycyclic aromatic hydrocarbons and other toxic substances.
The sources of haze are diverse, such as automobile exhaust, industrial emissions, building dust, garbage incineration, and even volcanic eruptions. Haze weather is usually caused by the mixed effect of multiple pollution sources. However, different pollution sources play different roles in haze weather in different regions.
How far is the haze from us? We can't see or touch it. Maybe when we can see and touch it, we will not be far from seeing God.
Everyone talks about haze and turns pale. Everyone fears PM2.5. It may be a habit for many people to watch the weather forecast every day. Previously, they just wanted to know whether the weather will be sunny or rainy in the future. Now we are more concerned about PM2.5.
Sometimes I wonder if it is possible for me to predict the unpleasant haze
The answer is yes, because today Patriot brought an air detector model KT02. Its name is Kongtandan.
The package is very small and square. I believe the fuselage will not be large. The design of the front is mainly white, in addition to the outline of the product outlined in gold.
On the side is the product model: air detection expert KT02
At the bottom is the QR code and product information. This is a portable air detector. From the parameters, we can see that the battery capacity of the product is 450mAh, it supports Bluetooth 4.0, and the device requirements are Android 4.4&IOS 6.0 and above. The trade name is PM2.5 tester.
Open the lid and be attracted by this cute product. It looks like a popular electronic pet.
This is all the accessories, the host, the charging cable, and the manual
The instruction manual is simple and clear. Through it, you can easily handle the operations of KT02. Of course, first of all, let's understand the basic structure of the product.
The length of the charging line is average, and the interface is a common micro usb interface for Android devices.
Let's first understand the appearance of the product.
Seen from the front, the fuselage looks smooth, and a small display screen on the top must be more than enough to display a series of numbers.
At the bottom is Patriot English LOGO. In the middle, I began to wonder what the round metal mesh means.
It is found that there is also a metal mesh cover at the corresponding position on the back of the fuselage. Afterwards, I guess that this should be the nearest place to test the air quality. It is specially mentioned in the instructions that it is forbidden to block the areas of these two metal mesh covers in use.
In addition to the metal mesh cover on the back, there is a back clip on the top, which is more convenient to carry.
The humanized design is that although the back clip partially blocks the metal mesh cover, since it is forbidden to block the area during use, the designer made a round hole in the back clip.
It can be seen from the side that the thickness of KT02 is not too thick. Too thick is not good, too thick is not good.
On the top of the fuselage is the key interface area, which is divided into Bluetooth key and PM2.5 key, and there is also a charging port.
This is how to remove the back clip.
There are four plastic pads on the four corners of the back, which should protect the four screws.
Sorry, this is not for drying my yellow and dirty thumbnails. I only found that the front and rear metal mesh covers are connected after I took the whole picture and opened the box.
From the appearance, KT02 is relatively portable. It depends on whether it can be used to test PM2.5.
Open the box and share here. Thank you for your support. Please look forward to the next experience.
