Anhui small flow mass flowmeter

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1. 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 as U-shaped pipe): high sensitivity and measurement accuracy, it is cur

rently 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.

2. What is a mass flow meter

1. What is a mass flow meter: A mass flow meter, abbreviated as MFM, is a precision sensor used to quickly and accurately measure the flow rate of process gases.

. The mass flow meter mentioned here is mainly used for low-pressure, low flow single or mixed gases. Low pressure is generally below 1Mpa, and the maximum can reach 3Mpa; The flow range is generally 0.1 sccm to 5000 slpm; Single gases such as common air, helium, argon, etc. require relative dryness and purity; For mixed gases, it is necessary to specify the type and proportion of gases. 2. What parameters can be obtained from a mass flow meter? The Yidu mass flow meter can accurately obtain five major parameters of gas: real-time temperature, pressure, operating flow rate, standard flow rate, and cumulative flow rate. The units of a mass flow meter are generally SLPM (liters per minute under standard conditions) and SCC

1. Working principle of mass flowmeter

2. What is a mass flow meter

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