The key to the construction of electromagnetic flowmeter consists of magnetic circuit system software, precise measurement conduit, electrode, housing, lining and converter.

Magnetic circuit system software: its function is to cause symmetrical direct current or communicate alternating current electromagnetic field.Dc magnetic circuit with a magnet to keep it, its advantage is that structure is simple, less affected by the communication of electromagnetic field, but it is easy to make according to the accurate measurement of intraductal liquid electrolyte solution electric polarization, the positive electrode is surrounded by air negative ions, negative electrode is surrounded by positive ions, the electrode electric polarization condition, and internal resistance to expand in the middle of two electrodes, so serious damage to the dashboard in normal work.When the diameter of the pipeline is large, the magnet is relatively large, heavy and uneconomic. Therefore, electromagnetic flowmeters generally choose alternating electromagnetic fields, which are caused by 50HZ dc switching power supply.

Structure parameters of small flow electromagnetic flowmeter

Precise measurement of the catheter: its function is to allow the conductivity of the measured liquid to be based on.In order to make the magnetic induction line according to the precise measurement of the catheter magnetic flux is separated or short-circuit fault, accurate measurement of the catheter must be made of non-magnetic, low conductivity, low heat transfer rate and a certain impact toughness of raw materials, non-magnetic stainless steel plate, glass steel corrosion prevention, high toughness plastic, aluminum, etc.

Electrode: its function is to find and be accurately measured proportional to the induction potential data signal.The electrodes are generally made of non-magnetic stainless steel plates, and are required to be flush with the lining to facilitate fluid mechanics without being obstructed.It should be installed in the vertical position of the pipeline to avoid precipitation on the top of it and harm the precision of accurate measurement.

Housing: made of ferromagnetic material, it is the housing of electromagnetic coil of excitation regulator of distribution mechanism, and protect the influence of external electromagnetic field.

Lining: a detailed insulating lining is provided on the inner side of the measuring tube and on the flange protruding surface.It immediately touches the liquid under test, its function is to improve the precise measurement of corrosion resistance of the pipe, to avoid the inductive potential by metal material precise measurement of the wall of the pipe short circuit fault.Lining raw materials are more corrosion - resistant, heat - resistant, wear - resistant polytetrafluoroethylene plastic, porcelain and so on.

Converter: the data signal of induced potential caused by liquid fluidity is very weak, which is greatly damaged by various influencing factors. The effect of converter is to increase the data signal of induced potential and turn it into a unified standard data signal and suppress key electromagnetic interference.Its daily task is to convert the induction potential data signal (Ex) detected by the electrode into a uniform standard dc data signal.

The flow meter can meet the needs of most markets, including water, oil, food, lubricating oil, chemistry, cosmetics, ink, pharmaceutical, coating, petroleum, automobile, glue, polyurethane, electrolyte and additives.