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『Working principle of mass 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)
1. Types and principles of mass flow meters
Types and principles of mass flow meters Mass flow meters are instruments that measure flow based on the mass of fluids and are widely used in industrial fields such as petrochemicals, pharmaceuticals, food processing, aerospace, etc. There are various types of them, and the working principles of each type are also different. Here are several common mass flow meters and their principles:
1. Thermal mass flow meter principle: Thermal mass flow meters use the heat of the measured fluid to determine its mass flow rate. It is used in conjunction with both heating and temperature sensors, with electronic instruments measuring the resistance at the sensor location and converting it into a flow signal. When the fluid flows through the sensor, it will take away some of the heat to grind the slag, causing the temperature of the sensor to drop and the resistance to change. By measuring this resistance change, the mass flow rate of the fluid can be calculated.
2. Principle of Ultrasonic Mass Flow Meter: Ultrasonic mass flow meters use the relationship between the propagation speed of ultrasonic waves at a certain frequency in the fluid and the flow rate to measure the mass flow rate.
. It typically uses 2 to 4 sound sources and receivers to measure parameters such as the time and velocity of sound waves propagating in the fluid. Due to the influence of factors such as fluid density, flow velocity, and temperature on the propagation speed of ultrasound in fluids, the mass flow rate of the fluid can be calculated by measuring these parameters.III. Principle of Rotary Mass Flow Meter: Rotary mass flow meters use the force of fluid on the rotor to measure fl
4. Principle of Gravity Mass Flow Meter: Gravity mass flow meter measures flow rate by utilizing the gravity effect in the fluid inside the flow meter with a device hung on the pipeline.
. When fluid flows through a flowmeter, it exerts a gravitational force on the device, causing displacement or deformation. By measuring this displacement or deformation, the mass flow rate of the fluid can be calculated. This type of flowmeter is commonly used to measure fluids in high-temperature and high-pressure environments.Fifth, Coriolis mass flowmeter (Coriolis force mass flowmeter) principle: Coriolis mass flowmeter uses the modulation effect of fluid mass flow rate on the oscillation of the vibrating tube, that is, the Coriolis force phenomenon, as the principle to measure mass flow rate.
. When the fluid flows through the vibrating tube, a Coriolis force is generated on the vibrating tube, causing it to undergo slight twisting deformation. By measuring parameters such as the degree and frequency of this twisting deformation, the mass flow rate of the fluid can be calculated. The Coriolis mass flowmeter can also measure parameters such as the density, volumetric flow rate, total amount, and temperature of the medium. Coriolis mass flowmeter has the advantages of high measurement accuracy, wide range, and good stability, and is widely used in industries such as petr