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Comparison of several options for natural gas flow meters: Natural gas is a commonly used fuel in both domestic and industrial applications. With the promotion of environmental protection, energy conservation, and green energy, its use is becoming increasingly widespread. It has been applied in industry. As a result, many meters for measuring natural gas have been developed. Next, we will discuss several common natural gas measurement instruments. Common natural gas meters available on the market today include: Rotameter flowmeters, gas turbine flowmeters, vortex flowmeters, thermal mass flowmeters for gases, and multi-channel ultrasonic gas flowmeters. The Roots flow meter can be considered a measuring instrument specifically designed for natural gas. It has been in use in the natural gas measurement industry for many years; it features extremely high stability, a very low starting flow rate, and strong adaptability to various field conditions. It can meet the requirements related to prepayment, trade settlement, and remote control, making it a preferred gas measurement product for gas companies, with a very high market share. The turbine flowmeter is the most widely used measuring instrument in the natural gas industry in recent years, following the rotameter. It offers better stability compared to rotameters, and its accuracy is also superior. Thanks to numerous field applications, the turbine flowmeter has gained recognition from both the industry and end-users. Turbine flowmeters are primarily used for measuring non-corrosive, clean gases, and they have also received positive reviews in other industries. Compared to the previous two types, vortex flowmeters offer a more affordable option for use in gas metering applications. Their measurement range and adaptability in various field conditions are fairly average, and they are often used as secondary instruments for process control or internal factory metering. The thermal gas mass flow meter is a specialized gas measurement instrument that has begun to develop in China in recent years. It has gained recognition in the market due to its extremely high range ratio, and it can directly measure the mass flow rate. Due to principle limitations, it is required that the temperature of the medium under test as well as its composition must not undergo excessive changes. It is often used for measuring a single gas medium or a mixed gas medium with a fixed composition. For diameters of 80 mm and above, ball valve inserts can be used, which significantly reduces the amount of work required for installation. It is possible to carry out installation without shutting down operations, as well as to perform subsequent online maintenance tasks. These inserts are widely used in various scientific research projects and have received high praise from those who use them on site. Gas ultrasonic flowmeters are high-end instruments for measuring gas; they offer high precision, a wide range of measurement capabilities, and no pressure loss. Their performance makes them ideal instruments for measuring natural gas. However, their cost is extremely high, and they are mostly imported, which makes it difficult for them to become widely available in the market. Flow metering is one of the components of measurement science and technology, and it is closely related to the national economy, national defense construction, and scientific research. Doing this work well plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. Especially in today’s era of energy crises and increasing automation in industrial production, the significance and role of flow meters in the national economy have become even more evident.