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electromagnetic flow meter working principle
sales01@cxflowmeter.com
The working principle of electromagnetic flow meter is based on Faraday's law of electromagnetic induction.
When a conductor cuts a magnetic wire in a magnetic field, an induced electric potential is created in the conductor. The effective length of the conductor in the induced electric field is proportional to the vertical motion speed of the conductor in the magnetic field. Similarly, when the conductive fluid flows vertically in the magnetic field and cuts the magnetic induction force lines, an induced electric potential will also be generated on the electrodes on both sides of the pipe.
The overall structure of the mag flowmeter is simple and reliable, with no moving parts, long service life, no intercepting and blocking parts, no pressure loss and fluid blockage. It can be used for automatic detection, adjustment and program control systems. It has no mechanical inertia, fast response and good stability. The measurement accuracy is not affected by physical parameters, such as temperature, viscosity, and density.
The electromagnetic flowmeter has no moving parts and no flow-blocking parts, which will not cause pressure loss, nor will it cause problems such as wear and blockage. The measurement range of electromagnetic flowmeter can reach 1 to 100. In addition, the electromagnetic flowmeter is only proportional to the average flow rate of the measured medium and has nothing to do with the axisymmetric flow state (laminar flow or turbulent flow).
At the same time, the electromagnetic flow meter also has a bidirectional measurement system. The straight pipe section required by the sensor is shorter, the pipe diameter is 5 times, and the pressure loss is small. The measurement is not affected by changes in fluid density, viscosity, temperature, pressure and conductivity and is mainly used in wastewater treatment.
The electromagnetic flowmeter is a volume flow measurement instrument that is not affected by temperature, viscosity, density and conductivity (within a certain range). Therefore, electromagnetic flowmeters can be used to measure the flow of other conductive liquids without additional corrections.
Electromagnetic flow meters cannot currently be used to measure liquid media with very low conductivity. The conductivity of the liquid medium to be measured must not be less than 10-5 (S/cm), which is equivalent to the conductivity of distilled water. Due to temperature limitations, industrial electromagnetic Flowmeters cannot measure high-temperature and high-pressure fluids, and electromagnetic flowmeters are easily affected by external electromagnetic interference.
If you want to know more about electromagnetic flow meters about how to select, quote and install them, you are welcome to consult at any time: sales01@cxflowmeter.com
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