china good price precise XFE electromagnetic flow meter for conductive liquid

Quick Details

Product Name: electromagnetic flow meter
Medium: conductive liquid
fluid temperature: -25~180Deg
fluid speed scope: 0.3~12m/s
conductivity: greater than 5 μs/cm
Electrodes material: SUS316L, hastelloy-C, hastelloy-B
Lining material: Neoprene CR,fluoroplastics,polyurethane rubber,alumina ceramics
Body material: 20# carbon steel, SS304, ETC.
inverter unit power supply: 220V, 24VDC,bettery
language: English/Chinese

Structure of the flowmeter

The structure of electromagnetic flowmeter is mainly composed of magnetic circuit system, measuring catheter, electrode, shell, liner and converter.

Magnetic circuit system

its effect is to produce a uniform dc or ac magnetic field.Dc magnetic circuit to achieve with a permanent magnet, its advantage is simple structure, the ac magnetic field interference is small, but it is easy to make by measuring the electrolyte liquid polarization in the ducts, the positive electrode is surrounded by negative ion, negative electrode is surrounded by positive ions, the electrode polarization, and lead to increased internal resistance between two electrodes, thus seriously affect the normal work of the instrument.When the pipe diameter is larger, the permanent magnet is also large, cumbersome and not economical, so the electromagnetic flowmeter generally adopts the alternating magnetic field, which is generated by the 50HZ power supply excitation.

Measurement catheter

its function is to let the tested conductive liquid pass through.In order to keep the lines of magnetic force by measuring the catheter flux was shunt or short circuit, measuring tube must be used no permeability, low electrical conductivity, low thermal conductivity, and has certain mechanical strength of materials, can choose not magnetic stainless steel, glass steel, high strength plastic, aluminum, etc.

Electrode

its role is to elicit and be measured in proportion to the inductive potential signal.The electrodes are normally made of non-conductive stainless steel and are required to be lined with the lining so that the fluid can pass through without being hindered.Its installation position should be in the vertical direction of the pipe to prevent sediment from piling up on it and affecting the measurement precision.

Enclosure

the application of ferromagnetic material is the outer cover of the distribution system excitation coil and the external magnetic field is isolated.

Lining

on the inside and flange of the measuring catheter, there is a complete electrical insulating lining.It is directly exposed to the measured liquid, which is used to increase the corrosion resistance of the measuring catheter and to prevent the inductive potential from being short-circuited by the metal tube wall.The lining material is mostly corrosion resistant, high temperature resistant, wear-resisting polytetrafluoroethylene plastics, ceramics and so on.

Converter

the induction electric potential signal generated by the liquid flow is very weak, much affected by various interference factors, the role of the converter is the induction electric potential signal amplification translates into a unified standard signal and suppress the main disturbance signal.The task is to convert the electrode detected by the electric potential signal to a uniform standard dc signal.