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How to measure the relationship between volumetric flow rate and mass flow rate?
1. Definition of Mass Flow Rate and Volume Flow Rate Mass flow rate refers to the mass of fluid passing through a pipeline or section per unit time, measured in kg/s or kg/h. The calculation formula is: qm=ρ⋅ u ⋅ A, where ρ is the fluid density, u is the flow velocity, and A is the cross-sectional area of the pipeline. Volume flow rate: refers to the volume of fluid passing through a pipeline or section per unit time, measured in m ³/s or L/min. The calculation formula is: qv=u ⋅ A, which means that the volumetric flow rate is the product of the flow velocity and the cross-sectional area of the pipeline.
2. The physical meaning of the difference between the two is that mass flow rate focuses on the mass of the fluid, while volumetric flow rate focuses on the volume of the fluid. Factors affected by Luchang collapse: Volume flow rate will change due to changes in temperature and pressure (especially gas) 211. Mass flow rate is not affected by temperature and pressure fluctuations (due to the conservation of mass) 211
3. Conversion Relationship Mass flow rate and volumetric flow rate can be converted to each other through fluid density (ρρ): qm=qv ⋅ ρ qv=qm/ρ For example, if the volumetric flow rate and fluid density are known, mass flow rate can be quickly calculated, and vice versa
4. Application Scenarios Mass flow rate: Suitable for scenarios that require accurate quality control, such as chemical reactions, pharmaceutical production, and trade settlements (such as natural gas metering). Volume flow rate: commonly used in fluid transportation, water treatment, and other scenarios, especially for measuring inco
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2. Emerson Mass Flow Meter Specifications
The specifications of Emerson mass flow meters vary depending on the model, but their general performance and some typical model configurations can provide you with clear references.
. 1. General specification measurement accuracy: The accuracy of liquid measurement is between 0.1% and 0.05%, and the repeatability is between 0.05% and 0.025%; The gas measurement accuracy ranges from 0.25% to 0.35%, with a repeatability of 0.20%; The accuracy of density measurement for crack bridge clearance is 0.0005 to 0.0002 g/cc, and the repeatability is 0.00025 to 0.0001 g/cc. Caliber range: covering a wide range of sizes from 1/12 inch (DN2) to 12 inches (DN300). Pressure range: The selected rated pressure can reach 414 barg (6000 PSI). Temperature range: capable of stable operation in harsh environments ranging from -240 ° C to 350 ° C (-400 ° F to 662 ° F). Electronic components: Provides rich I/O options, including mA, frequency, discrete signals, as well as multiple communication protocols such as HART, Modbus, Ethernet/IP, PROFINET, FOUNDATION fieldbus, etc.2. Specific specifications for some models CMFS sensor series (taking CMFS010M323M6BAMCZZ as an example) Sensor size: 1/10 inch (DN2). Basic model material: 316L stainless steel. Process connection: # 4 VCO 316/316L Swagelok compatible connector, equipped with 1/4 inch NPT internal thread adapter. Shell and hygiene options: Made of 316L stainless steel shell. Electronic interface: Configure MVDSolo; Polyester paint coated aluminum integrated enhanced core processor (for OEM); When ordering instruments with certification codes C, A, Z, and damping I, MVD Direct Connect intr