Working principle of U-shaped flowmeter | Working principle of mass flowmeter

『Working principle of U-shaped flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

What are the flow regulation methods for metering pumps?

2. Working principle of mass flowmeter

The mass flowmeter directly measures the mass of the fluid based on the principle of Coriolis force, and calculates the accurate mass flow value by detecting the phase difference or frequency change generated by the U-shaped tube under the action of fluid flow.. The core principle of a Coriolis Mass Flowmeter is the Coriolis effect. When a fluid flows through a vibrating measuring tube, a Coriolis force proportional to the mass flow rate is generated. This force will cause the measuring tube to twist, and the mass flow rate of the fluid can be directly calculated by detecting this twisting amount (usually manifested as the phase difference or time difference between the inlet and outlet), without the need for pressure and temperature compensation like a volumetric flow meter.

2. Key components and workflow drive coils: generate alternating electromagnetic force to continuously vibrate the measuring tube at its natural frequency. Measuring tube: usually U-shaped, Ω - shaped, or straight tube shaped, it is the channel and core sensitive component of the fluid. Sensor: located on the inlet and outlet sides of the measuring tube, used to detect the phase change of vibration on both sides. Transmitter: Receive the signal from the sensor, calculate the phase difference (Δ t) and convert it into mass flow rate and density values

3. The main technical types are mainly divided into two types based on the shape and vibration mode of the measuring tube: straight tube type: low pressure loss, less prone to scaling, but relatively low sensitivity, commonly used for high flow measurement. Bend type (such

Working principle of U-shaped flowmeter
as U-shaped pipe): high sensitivity and measurement accuracy, it is currently the most mainstream type, but the pressure loss is relatively large. Main advantages and limitations: direct measurement of mass flow rate, extremely high accuracy (up to ± 0.1%); Can simultaneously measure fluid density and temperature; Measurement is not affected by changes in fluid properties (viscosity, density, pressure, temperature). Limitations: High initial cost; High requirements for installation (need to avoid leakage, external vibration, and stress); For small-diameter instruments, the pressure loss is relatively large. Due to its high precision and direct measurement of quality, it is widely used in industries that require accurate measurement, trade settlement, and process control, such as petrochemicals, food and pharmaceuticals, semiconductor manufacturing, and energy metering.

3. Working principle of mass flowmeter

The working principle of mass flowmeter is based on thermal sensing measurement, which measures the flow rate by the molecular weight carried away by the separated molecules.

. This measurement method will not be affected by changes in gas temperature and pressure, so mass flow meters can provide accurate, fast, reliable, efficient, stable, and flexible flow measurement. Specifically, mass flow meters are mainly divided into several types, including thermal mass flow meters, differential pressure mass flow meters, and Coriolis mass flow meters, each with their own working principles and characteristics. A thermal mass flowmeter uses an external heat source to heat the gas being measured inside the pipeline, and calculates the mass flow rate of the gas by measuring the change in heat generated by the

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