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1. How does the principle of a mass flow meter work? The working principle of a mass flow meter is to use an external heat source to heat the measured fluid inside the pipeline, and reflect the mass flow rate of the fluid by measuring the heat changes caused by fluid flow. The specific principle and working method are as follows: Basic principle: When the fluid flows in the pipeline, it is heated by an external heat source. Thermal energy flows with the fluid Zheng Sun, and the fluid flow will take away some of the heat, causing a change in temperature. By measuring this temperature change, the mass flow rate of the fluid can be reflected. Measurement method: Constant heating power method: Maintain a constant heating power, measure the temperature difference caused by fluid flow, and calculate the mass flow rate based on the temperature difference. Constant temperature difference method: Keep the temperature difference between the heater and the temperature measuring element constant, and calculate the mass flow rate by measuring the required heating power. This method is relatively simple and easy to implement, so it is widely used in practical applications. Non contact measurement method: To avoid contamination or corrosion caused by direct contact between heating and temperature measuring elements and the measured fluid, non-contact measurement method can be used. In this method, the heater and temperature measuring element are installed outside the thin-walled tube, and the fluid passes through the inside of the thin-walled tube. This measurement method is suitable for measuring small flow rates in small-diameter pipelines. The method of expanding the range: When measuring large flow rates, the method of diversio
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
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