Electromagnetic Flowmeters (Electromagnetic Flowmeters, EMF) is a new flow meter developed rapidly with the development of electronic technology in the 1950s and 1960s.  Electromagnetic flowmeter is a kind of instrument which uses electromagnetic induction principle and measures the flow of conductive fluid according to the electromotive force caused by the conductive fluid through external magnetic field.  

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

Magnetic circuit system: its function 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 diameter of the pipe is large, the permanent magnet is correspondingly large, cumbersome and uneconomical, so the electromagnetic flowmeter generally uses alternating magnetic field, and is generated by 50HZ power supply excitation.  

Measuring catheter: the function of which is to allow the conductive liquid to pass through.  In order to make the magnetic flux be shunt or short-circuit when the magnetic force line passes through the measuring catheter, the measuring catheter must be made of non-magnetic, low conductivity, low thermal conductivity and certain mechanical strength materials, such as stainless steel, glass fiber reinforced plastic, high strength plastic, aluminum and so on.  

Electrode: its role is to elicit and measured proportional to the induction potential signal.  Electrodes are generally made of non-magnetizing stainless steel and are required to be flush with the lining so that fluid can pass unimpeded.  Its installation position should be in the vertical direction of the pipeline, in order to prevent sediment accumulation on it and affect the measurement accuracy.   

Case: made of ferromagnetic material, it is the outer cover of the excitation coil of the distribution system and isolates the interference of the external magnetic field.  

Lining: a complete electrical insulating lining is provided on the inside of the measuring tube and on the flange sealing surface.  It is in direct contact with the measured liquid and its role is to increase the corrosion resistance of the measuring catheter and prevent the induction potential from being short-circuited by the wall of the metal measuring catheter.  Lining material is corrosion-resistant, high-temperature resistant, wear-resisting polytetrafluoroethylene plastic, ceramics and so on.  

Converter: the induced potential signal generated by liquid flow is very weak and greatly affected by various interference factors. The role of the converter is to amplify the induced potential signal and convert it into a unified standard signal and suppress the main interference signal.  Its task is to convert the induced potential signal Ex detected by the electrode into a unified standard DC signal by amplification.  

Kaifeng PuSheng instrument co., LTD., mainly producing all kinds of rotor meter, the level of spiral meter, vertical spiral water meter, water meter, prepaid intelligent water meter, IC card intelligent water meter, bluetooth intelligent water meter, nb intelligent water meter intelligent water meter and valve control meter, such as photoelectric read-only meter, ultrasonic heat meter, ultrasonic water meter, electromagnetic flowmeter, the throttle device, the vortex street flowmeter,  Turbine flowmeter, and related software and hardware development, the company has intelligent circuit board and software research and development capabilities, through the ISO9000 certification system is a collection of research and development, production, sales, after-sales service, technical training as one of the high-tech production and development enterprises. 

With decades of experience in the production and service of water meters, electricity meters and other meters and calibration devices, we have the best quality control experts and scientific research and production team in China.  Company measurement experts get the measurers through certificate issued by the state in 1982, the quality control experts in 1968 (the original 983 factory), now known as artisans power of the luoyang bearing factory equipment factory work, presided over many products to participate in the national competition for weighing apparatus in China the national front row, computer industry core expert team with 20 years of experience, double card master,  And scientific research institutes, universities, as well as a number of master's doctor cooperation to set up a RESEARCH and development service team, with various aspects of the system of research and development and production capacity, flow meter by decades of experience in the flow meter technical experts carefully built supervision.  We service clients with unit of former five machine department, Beijing, Shanghai, ningbo and other places, shanxi, shandong, hebei, etc all kinds of users throughout the country, dozens of tap water company, we have training of luoyang, zhengzhou city tap water company check personnel, we have decades of instrument technical service and technical support capabilities.