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What are the corresponding sizes of various specifications of vortex flowmeters? The size specifications of vortex flowmeters may vary depending on different manufacturers and models. Generally speaking, nominal diameters ranging from DN15 to DN600 or even larger are covered. For vortex flowmeters with smaller diameters such as DN15-DN50, the overall length is relatively short, usually around 150-300mm, and the height and width are also relatively small. Li Huai is suitable for smaller pipeline installation spaces, and its flange size meets the corresponding national standards, making it easy to connect with pipelines. The length of the circular DN80-DN200 vortex flowmeter is approximately in the range of 300-600mm. As the diameter increases, the length, height, and width will also increase accordingly to ensure measurement stability and accuracy. The flange size is also increased according to the standard to match larger diameter pipelines. When the nominal diameter reaches DN250-DN600 and above, the size further increases, and the length may be around 600-1500mm. The overall shape is larger to meet the needs of high flow measurement, and the installation flange and other connecting components are also compatible with large-diameter pipelines. In practical applications, when selecting a vortex flowmeter, it is necessary to determine the most suitable size specifications based on specific factors such as pipeline diameter, installation environment, and process requirements, and refer to the detailed product specification manual provided by the manufacturer to ensure smooth installation and use. 2. Could anyone please explain in detail the starting flow rate of the flowmeter, the more detailed the better. 
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>The vortex flowmeter is a flow measurement instrument designed based on the Karman vortex principle, suitable for measuring the volumetric flow rate of gases, liquids, and vapors, as well as the volumetric flow rate or mass flow rate under standard conditions.. Its measuring medium includes but is not limited to gas, liquid, and vapor, with various connection methods including flange clamping, flange, and insertion, and a wide range of caliber options. The measurement range of the vortex flow sliding pin gauge is wide and suitable for fluids with Reynolds numbers between 1.5 × 104 and 4 × 106. For gases, the measurement range is 5-50m/s; The measurement range for liquids is 0.5-7m/s. In addition, the measurement accuracy of vortex flowmeter is divided into 1.0 level and 1.5 level, and it is believed that the temperature range of the measured medium covers normal temperature -25 ℃~100 ℃, high temperature -25 ℃~150 ℃ or -25 ℃~250 ℃. This flowmeter has two output modes: pulse voltage output signal and pulse current remote transmission signal. The high level of the pulse voltage output signal is 8-10V, the low level is 0.7-1.3V, the pulse duty cycle is about 50%, and the transmission distance can reach 100 meters. The pulse current remote transmission signal is 4-20 mA, with a transmission distance of 1000 meters. The working environment requirements for vortex flowmeters are relatively tolerant, with a temperature range of -25 ℃ to+55 ℃ and humidity of 5-90% RH below 50 ℃. The material selection of vortex flowmeter is diverse, including stainless steel and aluminum alloy. The power supply is flexible and can use DC24V or lithium battery 3.6V. Its explosion-proof level is intrinsic safety iaIIbT3-T6, and the protect