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1. Overview: The water meter is used to measure the total one-way flow through the pipeline. It can be divided into hot water meter and normal temperature water meter (commonly referred to as water meter) according to its use; According to the measuring mechanism, it can be divided into rotor type water meter and horizontal spiral type water meter; According to the state of the meter head, it can be divided into wet water meter, liquid-sealed water meter and dry water meter. 2. Manufacturing method: The manufacturing of water meters includes casting, cutting, assembly, calibration, inspection and packaging. Each process has a close relationship with the quality of the finished water meter, such as the shape of the water meter cavity (box), the quality of the inner surface, the shape and roughness of the measuring impeller, the spiral wing, the installation and calibration of the reduction mechanism and the indicator mechanism all affect the working accuracy of the water meter. 3. Purpose: It is mainly used to measure the water consumption of factories, mines, enterprises and households. 4. Type: (1) LXS rotor wet-type water meter: the rotor wet-type water meter is applicable to the measurement of the total one-way flow of small diameter pipes. For example, the household water consumption of pipes with diameter of 15mm and 20mm is used. The water meter is mainly composed of a shell, an impeller measuring mechanism, a reduction mechanism, and an indicator. It has the characteristics of simple structure. (2) LXL horizontal spiral wing water meter: the horizontal spiral wing water meter is used to measure the total flow of large flow pipes. It is especially suitable for water consumption of main water supply pipes and large factories and mines. The main features are large circulation capacity, small size, compact structure, and easy to use and maintain. (3) LXSY rotor type single-flow liquid seal water meter: the purpose is the same as LXS type. The difference in structure is that it closes the indicator mechanism with special liquid to prevent water from entering the indicator mechanism, and the water pressure acts on the rotor from one side of the rotor. (4) LXSG rotor multi-stream (magnetic transmission) dry water meter: this meter has the purpose of LXS type, and has its unique structural features. The transmission of its impeller measuring mechanism and sealed indicator mechanism is realized by magnetic coupling. This indicator mechanism is isolated from water, preventing the indicator mechanism of wet water meter from being corroded and stained by water, so as to keep the indicator mechanism clear for a long time. (5) Hot water meter: the structure of hot water meter is the same as that of normal temperature water meter, for example, the structure of LX-SR hot water meter is the same as that of LXS water meter. However, in order to meet the special needs of measuring hot water, all parts are made of heat-resistant materials. (6) The electric measurement technology of non-electric quantity is applied to the water meter to form a remote water meter. In structure, the sensor is usually added behind the reducer and connected with the digital display instrument by cable. 5. Model and specification: The model is expressed in letters and the specification in numbers, representing the nominal diameter. For example, LXL-80 refers to horizontal spiral wing water meter. The nominal diameter of 80 refers to the horizontal spiral wing water meter, and the nominal diameter is 80mm. 6. Performance index: Main technical parameters of water meter include: (1) Water temperature: This parameter specifies the maximum temperature of the water meter. Users should select appropriate models and specifications to meet their needs, otherwise, the water meter will not measure the total water flow accurately. (2) Working pressure: specifies the maximum pressure of the measuring water body of the water meter. If the water pressure exceeds this limit, the water meter may be damaged or leaked. (3) Flow coefficient: it includes nominal diameter, maximum flow, nominal flow, boundary flow, minimum flow and starting flow. Users can select nominal diameter and nominal flow according to practical needs. The initial flow reflects the sensitivity of the water meter. (4) Indication error. (5) External dimension and weight: the external dimension of the water meter includes various parameters to be understood during installation, such as length, width, height, connection thread, etc. In addition, the size and weight are related to packaging and transportation. 7. Inspection method: The water meter is inspected according to the technical conditions of each manufacturer and GB/T778. Inspection items: appearance inspection (including overall dimensions, etc.), hydraulic test, indication error, flow measurement and accelerated wear test. The minimum number of water meters to be tested is 3, and the maximum number is 10 when it is necessary to increase the number of water meters to be tested. 8. Sign: The arrow indicating the water flow direction and the nominal diameter of the water meter are projected on the case. Mark the trademark on the dial. Mark the measurement grade and manufacturing number under the cover. 9. Packaging, storage and transportation: Each water meter shall have a separate small package to prevent collision during transportation and handling. The water meter shall be placed horizontally. The water meter is a kind of instrument, and the outer package should be marked with "up" and "handle with care". The water meter shall be stored in a dry place with an ambient temperature of 5-40 ℃ and no corrosive medium in the air.

The global water meters market totaled 118 million units shipped in 2017, of which one in every four meters had communications. Smart meters will grow to account for more than one-third of all unit shipments by 2025 as communicating meters continue to displace basic ones at increasing rates. For the last decade the communicating water meter market has primarily grown in regions such as Europe and North America, where existing market drivers such as ageing infrastructure and high labor costs have made smart metering investments cost-effective. In new markets such as the Middle East, India, Australia and China, environmentally oriented policies and the declining cost of technology are starting to provide growth. However, Latin America continues to lag behind the rest, as technical and economic factors are pushing utilities away from more expensive, challenging technologies and towards cheaper options. According to the new IHS Market Water Meters Report, the overall global result is therefore one of increasing growth for the water meters market across the forecast period. Smart metering potential in Latin America fades Whilst some considered Latin America to have high future potential for smart metering, the current reality is that utilities in the region tend to lack the same level of access to workforces with IT skills and training as in other regions. Combined with the growing presence of Chinese manufacturers offering low cost basic meters in markets (such as Brazil, Central America, Mexico, and various South American countries), utilities are pushing forward with the lowest possible cost options. China lifts the global communicating meters market to new heights In contrast, the new IHS Market forecasts show that global communicating meter shipments will more than double in size by the end of 2024. Asia Pacific is the most influential market behind this trend due to the overwhelming dominance of China globally. The continuous displacement of basic meters with communicating meters in China is largely driven by policies that support new network technologies and a growing middle class, which increases the cost of labor and strengthens the business case for automation. Nonetheless, the North American and EMEA markets still account for over 40% of communicating meter shipments in 2017 collectively and maintain growth over the long-term. In these more established markets, Water meters market to be one-third smart by 2025. the conversation increasingly moves towards the total metering solution and related software/services as part of the utility`s investment. No single technology will dominate the communications landscape of the future One of the key considerations for the total metering solution is the connectivity technology, but the future communications market will be a hybrid landscape. Technical specifications are not necessarily the primary drivers of technology decision-making – the total cost of ownership is a larger factor (read more here). Moreover, cost is often strongly influenced by specific regional factors and thus the popularity of a technology tends to cluster by region: In China, NB-IoT will increase quickly because of state-backed initiatives and large investments by Huawei to build out the network; In Europe, the region ha d many pilots for LoRa meters in 2017/2018 and will start to see full scale projects rolling out by 2020; and in North America (where many utilities typically want to own their networks) fixed network categories such as RF Mesh continue to dominate the region. In all cases, the increased focus on total solution and the ongoing rollouts in several key regions point to prolonged and strong growth for communicating water meters for several years to come.

1. Choose the correct caliber of the water meter; 2. Install horizontally, with the surface facing up, and the direction of the arrow on the case is the same as the direction of the water flow. The installation location should avoid exposure, flooding, freezing and pollution, and facilitate disassembly and meter reading. For newly installed pipelines, the sand, gravel, hemp and other debris in the pipeline must be rinsed before installing the water meter to avoid failure of the water meter; 3. Valves should be installed upstream and downstream of the water meter, and should be fully opened when using it; 4. The necessary straight pipe sections or equivalent rectifiers shall be installed upstream and downstream of the water meter. The length of the upstream straight pipe section shall not be less than 10D, and the length of the downstream straight pipe section shall not be less than 5D (D is the nominal diameter of the water meter). For eddy currents caused by bent pipes or centrifugal pumps, a rectifier must be installed in front of the straight pipe section; 5. When installing the water meter, it should be noted that the outlet of the downstream pipe of the water meter is 0.5m higher than the water meter, so that the meter is incorrectly measured due to insufficient water flow in the pipe; 6. The water meter has excellent anti-clogging performance, but it is sensitive to silt and weeds in the pipeline, and should be avoided as much as possible during use. If there is silt and weeds in the pipeline, it should be cleaned up in time, otherwise it will affect the normal measurement of the water meter.

As we all know, the smart water meter is a water meter product that has been built in recent years. He has achieved the Internet of Internet, which greatly reduces the internal consumption of customers in the process of use, and the technology of smart water meter uses avant-garde, with the continuous development of Internet technology, the development of intelligent water meter The prospect is still very considerable. For the construction of the entire city, the rapid development of smart water meters can also lay the foundation for the development of intelligence, so that the water system of the whole city has become more intelligent. By using high-frequency collection water meter, it can also help users analyze leaks, especially for industrial users, and large users can also help users save water resources and save costs.

First: Smart water meter must be dampproof and antifreeze. Although the intelligent water meter has advanced intelligent technology, it does not mean that the intelligent water meter is "inviolable to water and fire". In order to ensure the normal operation of the water meter, it is best to check the water meter regularly. If the temperature is low in winter, keep warm and cover the moisture-proof cover at the same time. 2:Smart water meter must avoid contact with corrosive substances. The damage of corrosive substances to the precision instrument of intelligent water meter is fatal and must not be touched. In addition, strong collision and impact will also cause damage to the smart water meter. 3:Do not approach the smart water meter with strong magnetism or other instruments with strong interference function, otherwise the function of the smart water meter will be confused or even "strike"