​Application Of Electromagnetic Flowmeter In Industrial Production

Application Of Electromagnetic Flowmeter In Industrial Production

The structure of the electromagnetic flowmeter mainly consists of magnetic circuit system, measuring conduit, electrode, shell, lining and converter. Its function is to generate a uniform DC or AC magnetic field. The DC magnetic circuit is implemented with permanent magnets. Its advantage is that the structure is relatively simple and is less disturbed by the AC magnetic field. However, it easily polarizes the electrolyte liquid passing through the measurement catheter, causing the positive electrode to be surrounded by negative ions and the negative electrode to be surrounded by positive ions. Surrounding, that is, the polarization phenomenon of the electrodes, causes the internal resistance between the two electrodes to increase, thus seriously affecting the normal operation of the instrument. When the diameter of the pipe is large, the permanent magnet is correspondingly large, bulky and uneconomical, so electromagnetic flowmeters generally use alternating magnetic fields and are generated by 50HZ power frequency power supply.