Since coming to the capital (Beijing), we have begun to pay attention to the environment. Before going out in the morning, first take out your mobile phone to check today's air quality, and then decide whether to wear a mask. Since there is no air detection equipment, I have never been clear about the indoor environment. This time, I was lucky to be able to apply for 720 Environment Treasure on Lei Feng's website. I was so happy that I finally had the opportunity to monitor the environment in various environments. My report may not come out quickly, because I am constantly testing and playing. Check whether this environment treasure can measure accurate data. After several days of testing, it is found that this thing:, If you want to know how, please look down.    

As each person is going to install an arduino as a hobby, they also inquired about the relevant PM monitoring hardware on Taobao. There are two main categories. One is the ordinary dust sensor, which can be taken down for more than 20 years, and PM2.5 cannot be measured, so the accuracy is average, because someone said that the dust sensor can measure dust. There is also a laser sensor, which is more than 100, so its accuracy is high, and all PM values can be detected. After checking that the ordinary formaldehyde sensor is more than 130 on Taobao, I wonder which sensor is used in 720 Environment Treasure. After all, it sells 559?

Overall, the packaging design was really good! This must be praised. It is said that Xiaomi Company even copied the "best gift". I really felt similar after reading the picture. There are serial numbers and other information on the box, which is the same as the mobile phone. In fact, what's the use of this? I won't say much here. After receiving the goods, I saw the package and had to endure it until I went home after work.

The box was sealed with two seals. It seems that Lei Feng didn't open the package and paste the logo this time. This time, I really enjoyed opening the package. After opening, I found that there were stickers in the package!! Three baby bears with different expressions. Later, it was found that most of the consumers who bought air quality monitoring were new mothers, because at this time, mothers were worried about the impact of poor air quality at home on their children. Inside the package are product specifications, WeChat messages, Sina Weibo account, etc.

At the same time, there is also a data line. This data line is flat, which has the advantage that it is not easy to wind. I feel that the quality is good, not like the low-quality data cable configured for general digital products. At the same time, there is a 720 logo on the USB connector, which seems to be customized.

Finally, the key point is that air detection equipment is generally sealed when it leaves the factory to prevent dust from entering during storage and causing pollution. Therefore, 720 uses bags to seal rather than simple packaging. Like this place!!

I must emphasize this appearance. Maybe I have more complaints here.

1. First of all, the key point is that since it is air quality monitoring, I do not know how to place it correctly. Horizontally placed: it seems that the air hole below is blocked. At present, I don't know what the air hole is for? Lay it flat: feel that it will block the air inlet. Put it vertically: the air hole is just below! Is this correct? So the manufacturer should explain the placement method in the instruction manual. Or design a prompt to know how to place it. At present, I think the following figure is the correct placement.

2. Workmanship. The 720 Environment Treasure frame is made of aluminum alloy. There are two sides of the package, on which there are indicators made by laser drilling. If you have a Xiaomi bracelet, you will know what it feels like. But, however, the important thing is said three times, but the effect of the indication is not perfect. The power indicator is a white LED light, but the appearance can only show half. It feels that there are not many laser holes and enough light transmission. You can see the effect. Moreover, the edge even leaks light!!! For PM and other test indicators, the brightness is not enough, and the light leakage is also serious. Why on earth? I will disassemble and analyze it later. At the same time, the gap between the aluminum alloy frame and the upper and lower joints is not the same.

The indicator light displays unevenness and the gap between the button and the shell is large

Light leakage on both sides of indicator

3. Air inlet design: I looked at other evaluations before and said that the position of the air inlet can be attached with a lanyard. I want to ask if this is possible? If you put a lanyard at that position, how many particles will be produced when the lanyard rubs at that position, and how many particles will be accumulated on the lanyard, which will lead to inaccurate data. At the same time, I personally feel that this mouth is a place where dust accumulates, and it is not easy to clean. So I suggest that this should be opened when monitoring, and closed when not in use.

After testing, all sensors are in this position, because when exhaling in this position, the humidity PM、 Formaldehyde will change significantly, and other estimates are also here.

4. Appearance design: It feels like a power pack, which means that the product features are not distinctive enough. Does the manufacturer want to borrow Xiaomi's design philosophy that "no design is the best design"? But then again, taking it everywhere will not attract outsiders' attention, because others think you have a power bank. It's very good to sell it to the law enforcement department. It's under investigation!

After reading the above article, do you think it's very pessimistic? Indeed, I am not satisfied with the workmanship of the 720 Environment Treasure. But in order to make this evaluation work for consumers, we must be realistic. So I listed them all.

But you can go on to look at the functions here. In order to test the accuracy of various test data of this equipment, I test the indoor and outdoor environment under good air conditions, indoor and outdoor environment under air pollution, bus environment, bank environment, restaurant environment, formaldehyde data of new leather bags, formaldehyde amount of new furniture, etc.

Temperature, humidity, noise You can just look at the table for these data, but I need to mention that the monitoring speed of the temperature sensor is relatively slow. I have been outdoors for more than 10 minutes, and the monitored temperature is still inaccurate, which is that the sensor is hidden too deeply. The temperature detection can't be obtained in time, so the data will be obtained in 15 seconds. This advertisement should be low-key.

When the corresponding data monitoring is carried out, the corresponding light will flash.

      PM Through monitoring, it is found that the indoor environment is also good when the air environment is good, but if the outdoor pollution is serious, the indoor PM also rises. These two days, it happened to encounter changes in Beijing's air quality. After just testing, there are still changes. 01.21 The weather forecast air quality is one hundred and eighty It is measured by 720 one hundred and three I don't know whether there is comparability, which can only be judged by the readers themselves. It is also possible that the small edition is in the suburbs, and the forecast is for the urban area.

I found a problem. If I exhale at the air mouth during monitoring, I will find that the PM value will immediately soar to hundreds!! I don't know if there is a problem in my measurement. It should be a problem. As far as I know, masks are worn in clean rooms. It should be Partiacl to prevent exhalation.

Formaldehyde Through the small knitting test, the newly bought shoulder bag is seriously out of standard and has reached 1.28mg/m3. My station test formaldehyde has suddenly become bad because of this bag environment. There is also a contradictory story. I put 720 Environment Treasure in the packaging box for monitoring, and found that the formaldehyde in the box completely exceeded the standard. Is this a serious slap on the face? The packaging used as the testing equipment was unqualified. ha-ha!!! The following is the formaldehyde test curve of a new cabinet. My god, it tastes sour and refreshing.

Question: Why is it that formaldehyde can reach 0.2mg/m3 when exhaling into the mouth? Is there formaldehyde in your stomach? The editor just writes out the test questions, and the specific normal situation is not judged by the judge.

• It is suggested to add a single monitoring function, for example, I only measure temperature and PM, and then connect the daily data into a line to watch the curve changes.

• Why is there no data for PM monitoring, such as PM2.5, PM10, etc.? In fact, people pay more attention to PM2.5.
  

• It is recommended to use the positive one button detection function on the device, so as to avoid taking out the mobile phone for testing.

• It is recommended to optimize the appearance and workmanship. The workmanship needs to be improved to make the product exquisite.

• The battery display is inconsistent with the software. The phone displays full cells, but the device displays 3 cells.

• It is recommended to add wireless function, so that you can check the air condition at home in real time.

• It is easy to scratch on the table, and it is recommended to use a support pad.
  

My evaluation report may pay more attention to the use experience of product details, so I will focus on the key points I think so that consumers can judge whether these shortcomings are tolerable. My experience report may make the manufacturer uncomfortable, because what I said here is basically all shortcomings, because I see fewer advantages. My report may be a cold water that comes after you look at the perfection, so that you can calm down and determine whether it is worth buying. I did not charge anyone, but I just received a product evaluation from Lei Feng.com, so that consumers can understand the product. If you buy all kinds of inaccurate data and spend so much money, isn't it that your forehead is crowded?

Thank you for watching, anduony Thank you for seeing this!

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However,

Xiao Bian also made some attempts, but failed!

What attempt?

Disassemble 720 Environment Treasure!!!

But I failed, so I had to leave it behind silently.

In fact, after unpacking, I carefully observed whether there was any place for disassembly, but I didn't find the location for disassembly!!

The equipment also told me not to disassemble it, but I was a disassembly maniac. I wanted to disassemble it. I used my disassembly saber to disassemble it and pried the surrounding area all over. There was no sign of being pried open, and the surrounding area was scarred.

I found that the aluminum alloy frame can be pried off, and then found that the frame is stuck by double-sided adhesive.

The first hole should be the noise sensor, there is no special note on the equipment here, and the following four are corresponding indication buttons. However, Xiaobian still found a hole with a sensor inside. Xiao Bian suspects that it is a temperature sensor, but it is blocked under the frame? Personally, it's just a guess. No conclusion.

At this time, you may remember that the light of the power indicator is uneven. When the small braid is disassembled, it is found that the LED inside can only see half of the LED inside when viewed vertically, so only half of the LED can be lit, which is an uneven phenomenon.

This is the case after the frame near the power indicator lamp was disassembled. Later, I tried to disassemble it, but I found that I could do nothing. The manufacturer's prompt was not blank. If it is really disassembled, it will be destructive. Xiao Bian is a bit distressed.

However, according to the information displayed by the manufacturer, it can be inferred that the formaldehyde sensor used is the sensor of WINSEN. At present, a model has been found ME2-CH2O formaldehyde sensor, I think it should be this one. This sensor is not cheap. The quotation on Taobao is 138 oceans! For the PM sensor 720 manufacturer, Sharp has less advertising information. Based on the sensor, temperature, humidity and noise added to this air monitor, it is inferred that the PM sensor is Sharp. At the same time, it is found that the appearance design of 720 Health Treasure is very close to the appearance and thickness of this sensor (4.6 * 3 * 1.76cm). If the inference is correct, it should be. At the same time, we can infer why this guy can only display mg/m3, because according to the intelligent monitoring principle of this sensor's function, the reflected light of dust in the air is monitored by the infrared sensor (the infrared method can monitor particles that are 4 times larger than PM2.5, that is, PM10), and the specific accuracy is not as high as that of laser (the laser can monitor particles that are 8 times smaller than PM2.5).

If you use a laser sensor, you will find that there are several output lines to output the amount of various particle sizes. By the way, you can take a look at the 360 air detection master. What's the size of the shell? And he doesn't have a formaldehyde sensor. It can be inferred that 360 uses a laser sensor

Thank you for continuing to see here.