PM2.5 or haze has become a part of our daily life. I believe that many friends will get the outdoor air quality index of the day at the first time when they get up in the morning through mobile phones or radio and other weather forecast channels. But what about the indoor air quality index of our residence? Is the air purifier at home really cleaning the air seriously? Now, the author will introduce a portable PM2.5 air detector, called 352, which uses the laser scattering principle to accurately measure the surrounding air environment.

This 352 PM2.5 air detector uses the same outer packaging design as the iPhone product. This outer packaging design is not only space saving, but also elegant. And when the box cover is grasped by hand, the damping effect of the packaging box will not make the bottom of the box containing the product fall suddenly, nor will it cause trouble to open the box cover. The slowly sliding box bottom can be easily pulled out by hand.

The inside of the box is also very simple, with only the main body of the 352 PM2.5 air detector and a data cable for charging.

This portable 352 PM2.5 air detector is also very simple to use. It can be used online or offline alone.

The 352 PM2.5 air detector has only one switch, which is on the back of the product and next to its micro USB charging port. Long press for one second to start up, and long press for three seconds to pair online.

If you need to pair online, first scan the QR code at the bottom of the product to download and install the mobile app, and then you can pair online. From the bottom of the product, we can see that the model of this 352 PM2.5 air detector is M25, with a rated voltage of 5 volts and a rated current of 1 ampere. Basically all mobile phone charging adapters can charge it. The MAC address of the product is also marked in the bottom row, which makes it easier to manage the 352 PM2.5 air detector in the router.

The steps of online pairing are very simple. After downloading the app, simply register, enter the password of the LAN, click Add Device, and wait about a minute to complete the online pairing.

After the online pairing is completed, the device can be seen in the PM2.5 detector column of the app. Click the device to view the air quality in the room at any time, and there will also be a comparison with the outdoor air quality. It should be noted that you should set your position where the 352 air detector is allowed to use in advance in the mobile phone location, so that the sample collection for the external air environment will be more accurate. At the same time, if there is 352 air purifier in the room, it can be linked with 352 air detector. When the indoor air pollution reaches the warning value, the 352 air purifier can be opened through linkage.

The App can set the indoor air pollution warning value and the location and information of some rooms, which is mainly used to intelligently control the indoor air environment. If you don't want to turn on positioning, you can also directly set the area where the 352 air detector is located, and you can also give your device a nice personalized name. The app also provides air environment camera and sharing functions, so you can interact with friends on social networks at any time.

As all friends who have used air purifiers know, even in a closed indoor environment, the air environment index is not constant. It will change with our breathing, walking, opening the door, opening the window, cleaning the interior and other actions. However, it will basically fluctuate within a certain range. The unit of measurement adopted by this 352 air detector is microgram/m ³, which is also the unit of measurement commonly used by PM2.5.

The shell of this 352 air detector is made of integrated aluminum alloy body, with 2.5D arc screen design. It has a beautiful shape, and it is also beautiful to place it as a small ornament in the house at ordinary times.

Although the appearance is small, the body weight is 240 grams, which is a little heavy in the hand, and the smart phone used in peacetime is almost heavy. In addition, there is a 2400mAh large capacity battery hidden in the compact body. According to the actual use test of the author, it can last for about 12~14 hours. The reason why there is such an error of 2 hours is that the 352 air detector will automatically shut down after running for more than 12 hours. However, after the automatic shutdown, it can still be started to continue working, but it will automatically shut down after working for 5 minutes.

In the case of non networking, the 352 air detector will also automatically shut down 5 minutes after it is started. This design may be to save power and improve the endurance. In fact, if you take it with you, there is no need to pair it online, because you can always observe the air pollution around you from the screen of the 352 air detector.

In addition to remotely detecting the indoor air environment and controlling the air purifier through the linkage function, App will also automatically make a chart statistics of the recent indoor air environment index, so that we can more intuitively observe and analyze the laws of indoor air environment changes.

In general, this M25 portable PM2.5 air detector produced by 352 is a very practical small household appliance with exquisite production, exquisite workmanship, accurate measurement and convenient use. With it, you can detect the air environment around you at any time and anywhere. Although it can not prevent haze, you can at least know exactly how much haze you have absorbed, and you can also avoid some environments where PM2.5 exceeds the standard. You can also share it in your circle of friends at any time, so that you can know who you care about and who you are concerned about.

Of course, the only disadvantage of this small device is that it consumes too much power. Although a 2400mAh large battery has been installed, it can only work for 12 to 14 hours, that is, it must be charged once a day when connected to the network. If it is not connected to the Internet, it can work for a longer time, but it will be less interactive, and you can only take the air detector with you.

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