The performance of these old flagship phones is still worth buying

[PConline] The advanced configuration of the mobile phone now allows the user to use the device for a few years without any performance deficiencies. However, as far as the current mobile phone market is concerned, few users can insist on using the same handset for many years. Under such circumstances, it may well be appropriate to purchase some old flagships whose prices have been adjusted downwards. The configuration of these old flagships is now in the mainstream.

Although the old flagship mobile phone does not have a new flagship mobile phone configuration specification, but also as a high positioning mobile phone production, workmanship and materials are not out of tune, coupled with the price and the listing price tend to have a more obvious decline, the price has also been Ascension has become a popular target for many consumers. Next, the author will recommend several premium old flagships whose performance is still not to be left behind. They are the Apple iPhone 6s, the Samsung Galaxy S7 edge, the Huawei P9 and the ZUK Z2 Pro. If you want to get a mobile phone with good performance, But the budget is not enough, then these phones may wish to pay attention.

Recommended models: Apple iPhone 6s
Reference price: 3999 yuan from the recommended reason: 4.7-inch screen

Apple's mobile phone replacement speed is not fast, but is often synonymous with stylish mobile phones, in recent years, the design has always been the benchmark for mobile phones. Apple iPhone 6s has a relatively long time to market, but it is still relatively popular. iPhone 6s supports mobile, telecommunications, Unicom three kinds of 4G standard, users are free to choose mobile communications operators. Although Apple’s flagship model is the iPhone 7, the iPhone 7 has not changed much in appearance from the 6s, so the iPhone 6s is still worth buying.

Apple's iPhone 6s uses a 2.5D screen with a screen resolution of 1334×750 pixels and a pixel density of 326ppi, which remains at the level of previous generations and is at a disadvantage compared with the flagship Android phone. From the actual display effect, the picture quality is more exquisite, the color is gorgeous, the viewing angle is large, and the display effect is good. The fingerprint recognition module is located in the HOME key, and the recognition speed is still very fast. It is necessary to collect fingerprints in advance and can be used to purchase software, unlock the screen, and the like.

The Apple iPhone 6s uses a combination of a front-mounted 5 megapixel camera and a rear 12 megapixel camera. Both cameras have been upgraded compared to the previous generation. Apple iphone 6s uses iSight sensor, a single pixel area of ​​1.22μm, supports the largest f/2.2 aperture, self-timer can achieve Retina Flash fill light, shooting features include HDR, face recognition, panoramic, continuous shooting, 4K ultra high definition video recording Etc., compared with the iPhone 6s Plus lack of optical image stabilization, but the image quality is still quite good.

Apple iPhone 6 uses the 64-bit dual-core design of the Apple A9+M9 coprocessor, matching 2GB of running memory, and ROM has 32GB/128GB versions. 3D Touch is a selling point when iPhone 6s is launched. It can pop up secondary menus or switch applications according to the intensity of the press. Users can also receive touch feedback. In terms of software configuration, the Apple iPhone 6 is preloaded with iOS and has many new features.

Edit Comment: Compared to the iPhone 7, the iPhone 6s is not much lower in hardware configuration, but the price is indeed lower, which is a good choice for those who plan to buy an iPhone and the budget is not too many.

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Recommended models: Samsung Galaxy S7 edge
Reference price: 4288 yuan Recommended reason: double curved screen

During the MWC show this year, Samsung launched the new flagship Galaxy S8/S8+, both of which will also be available domestically at the end of May. The starting price will then be more than 5,500 yuan, which is relatively high. In the Galaxy S8 has a higher percentage of screen hyperbolic screen, if you want to buy a hyperbolic screen mobile phone and the budget is not too much, you can consider the Galaxy S7 edge, this phone is still very good performance in all aspects .

The Samsung Galaxy S7 edge uses a 5.5-inch screen, which is an overall bigger lap than the Galaxy S7. The back cover of the Samsung Galaxy S7 edge also adopts a double-sided curved design, which forms a symmetric arc surface with the curved screen on both sides, so that the hand is displayed more rounded.

In terms of configuration, Samsung is equipped with a Qualcomm Snapdragon 820 processor on the Galaxy S7 edge. It is equipped with a 4GB RAM+32GB/64GB/128GB ROM storage package. On the camera side, although the number of pixels dropped to 12 million pixels, it is commendable that the Galaxy S7 edge is equipped with a dual-core full-pixel sensing technology and F1.7 large aperture. Support full Netcom network standard, adopt and or slot design, support TF memory card expansion, support IP68 waterproof performance.

Samsung Galaxy S7 edge running Android 6.0 system is now upgraded to Android 7.0, UI for Samsung differentiated logo TouchWiz. S7 edge also has some features, such as long-lighting screen and reminders, as well as side screen function, users can add their own commonly used programs, easy to open.

Edit Comment: Now, Samsung Galaxy S7 edge is not a flagship level for every configuration, but the overall experience is still good, powerful shooting performance, high surface value brought by the hyperbolic screen. The current price of the Samsung Galaxy S7 edge has dropped significantly compared to the price it listed at the time of last year, and is suitable for consumers who have a budget of around 4,000 yuan.

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Recommended models: Huawei P9
Reference price: 2400 yuan Recommended reason: rear dual camera

At present, the flagship of the Huawei P series is the P10 Plus, and the hardware configuration has a certain upgrade compared to the P9 series phones last year, and the price is also a lot more expensive. At this time, if the budget is limited, consider the P9. Despite being the flagship model last year, Huawei's P9 still has good performance in all aspects, such as the post-powered dual-camera with Leica. The important P9 price is only 2,000 yuan.

Huawei P9's design continues Huawei's P8 design style, with aerospace-grade aluminum metal body, square outline of the fuselage. In addition to the arc-shaped frame, arc angle, and micro-arc design on the back edge, the Huawei P9 has a good grip on the whole and is comfortable to operate with one hand. In addition to the ceramic white color scheme, Huawei P9 also provided a streamer gold, titanium silver gray, moon silver, amber gold, and rose gold colors, followed by blue and red versions.

Huawei P9 is equipped with a Unicorn 955 processor, provides 3GB RAM + 32GB ROM and 4GB RAM + 64GB ROM and other memory combinations, using 5.2 inches 1080P resolution TFT screen, built-in 3000mAh capacity battery, fingerprint identification and full CNC Network standard. The Huawei P9 adopts a single card slot with dual slots. The two slots are the Nano SIM slot and the slot (Nano SIM or TF slot). Both slots support the full network access standard.

Huawei P9 is equipped with an EMUI 4.1 system that is based on Android 6.0 and has been upgraded to EMUI 5.0. In terms of battery life, Huawei P9 has a built-in 3000mAh battery. Huawei P9 supports fast charging. The original charger supports 9v2a with a maximum output power of 18w. With the 3000mAh battery, it is believed that the charging time of P9 will be around 1 hour and 10 minutes.

Edit Comment: The current flagship of the P series is P10, of which the lowest price is 3788 yuan, which is a lot more expensive than the current P2 of 2,400 yuan. If you like the color of Leica, if you have a limited budget and want to buy a new machine, consider P9.

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Recommended models: ZUK Z2 Pro
Reference price: 1699 yuan Recommended reason: high cost performance

The ZUK Z2 Pro is a flagship mobile phone that was launched last year. The phone includes a 5.2-inch 1080P full HD screen, a Qualcomm Snapdragon 820 quad-core processor, 4GB RAM, 64GB ROM, a front-end 8 megapixel camera, and a rear 1300. Megapixel camera, 3100mAh battery, etc.

The ZUK Z2 Pro uses a 2.5D Corning Gorilla Glass on the front, and continues the simple design of the series. There are no extra elements such as the brand logo except the top handset and front camera and the physical home key below. The ZUK Z2 Pro also uses a glass process on the back. The shape of the micro-arch also fits the grip. The body is reinforced with a shock-absorbing integrated metal frame in the RollCage structure, which not only increases the overall strength of the mobile phone, but also improves the performance of the antenna to some extent.

ZUK Z2 Pro uses a Snapdragon 820 quad-core processor, clocked at 2.15GHz, with a 5.2-inch 1080P Full HD Super AMOLED screen with a maximum viewing angle of 178°, and a front-facing camera with 8 million pixels, and a rear view. The camera is 13 million pixels, and uses a custom Samsung 1.34μm large pixel CMOS, also supports 4k high-definition video recording; 3100mAh battery capacity is not very large, but wins in support of Qualcomm Quick Charge 3.0 fast charging protocol, 85 minutes will be able to fill battery. The ZUK Z2 Pro runs an Android system and is very smooth.

Editor Comments: excellent hardware configuration, shooting ability is remarkable, plus the appearance is also more distinctive, as well as health monitoring functions such as U Health, ZUK Z2 Pro still has a very high cost. If you want to start with an affordable high-end mobile phone, but also more value for money, then you may wish to seriously consider the ZUK Z2 Pro.

Summary: Several old flagships on the above inventory, hardware configuration and software optimization are still in the middle and upper reaches, performance will not be insufficient, and it is worth buying. If you are a small screen beloved, you can choose 4.7 inches iPhone 6s, if you like the cool value of mobile phones, curved screen Samsung S7 edge is a good choice. If you are a photographer, you can choose Huawei P9 with dual camera. If you don't have a lot of budget, you may choose ZUK Z2 Pro. Everyone can choose according to their own preferences and budget.

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Analysis Meters

There are several analyzers used in water treatment to monitor and control the quality of water.

Some commonly used analyzers include:


1.PH Analyzer: Measures the acidity or alkalinity of water or solution.
2.Dissolved Oxygen Analyzer: Measures the amount of oxygen dissolved in water, which is essential for aquatic life.
3. Chlorine Analyzer: Measures the concentration of chlorine in water, which is commonly used as a disinfectant.
4. Ammonia Analyzer: Measures the concentration of ammonia in water, which can indicate pollution or contamination of the water .
5. Nitrate Analyzer: Measures the concentration of nitrates in water, which can indicate pollution from agricultural runoff or wastewater.
6. Phosphate Analyzer: Measures the concentration of phosphates in water, which can indicate pollution from agricultural runoff or wastewater.

These analyzers are used to continuously monitor the water quality and ensure that it meets the required standards for safe consumption or environmental protection.

Analysis meter, monitor meter

Kaifeng Chuangxin Measurement & Control Instrument Co., Ltd. , https://www.kfcxflowmeter.com