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What is the working principle of the gas flow meter? What are its characteristics?

by:Kaidi Sensors     2022-05-05
The basic principle of the role of the gas mass flowmeter: the gas produces a light signal. When the fluid is at the end of the pipe, the torsional angular velocity of the turbine meter is inversely proportional to the fluid velocity. The turbine is placed in the center of the pipe, which causes a change in the magnetic flux in the sensing coil. The sensor coil sends the detected magnetic flux cycle change signal to the preamplifier, and also sends the pulse signal to the frequency and current conversion circuit. And when the gas flow meter blade cuts the magnetic field lines emitted by the permanent magnet steel in the housing, the fluid velocity can cause velocity loss through it at this time. The gas converts the pulse signal into an analog current and detects the constant fluid medium viscosity and turbine replacement instrumentation through a sensing coil installed outside the housing. The characteristics of gas flow meter measuring gas flow: 1. High humidity fluid, some of which will contain a small amount of moisture, which will flow at the bottom of the pipe. 2. Gas producer gas, coke oven tar and usually viscous materials or similar materials, and some with a certain amount of dust output. 3. Sometimes the measured gas will have high hydrogen content, and the internal material will have low density at the same time. If the vortex flowmeter is used for measurement at this time, the signal capability is weak. 4. Since the fluid is flammable and explosive, gas has certain explosion-proof requirements. 5. When the measurement point is located at the outlet of the compressor, there is a certain flow pulsation. 6. Minimum flow and maximum flow parallax. 7. The system used for international settlement of trade has high requirements on measurement accuracy; as a system generally controlled by enterprises through monitoring and process management, the accuracy requirements are lower.
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