Composition of flow meter | Structure and principle of elliptical gear flow meter

『Composition of flow meters』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

What are the components of an electromagnetic flowmeter for "knowledge sharing"?

The electromagnetic flowmeter is mainly composed of a magnetic circuit system, measuring conduit, electrode, lining, housing, and converter, among which the magnetic circuit system, measuring conduit, electrode, and housing together constitute the electromagnetic sensor.. The following is a detailed explanation of each part: The magnetic circuit system is one of the core components of an electromagnetic flowmeter, and its function is to generate a uniform DC or AC magnetic field. The direction of the magnetic field is usually perpendicular to the axis of the measuring tube. When a conductive medium flows through the magnetic field, according to Faradays law of electromagnetic induction, the charge in the medium will generate an induced potential by cutting the magnetic induction line due to motion. The design of the magnetic circuit system needs to ensure uniform and stable magnetic field distribution to avoid measurement errors. Measurement catheter is a flow channel for conductive media (such as liquids), which guides the measured medium through the magnetic field area. To ensure that the magnetic flux is not diverted or short circuited when the magnetic field lines pass through, the measuring conduit needs to be made of special materials, including: non-magnetic: to prevent the magnetic field from being short circuited by the conduit material; Low conductivity: to avoid the induced potential being consumed by the conduit itself; Low thermal conductivity: reducing the impact of temperature on measurement accuracy; Mechanical strength: capable of withstanding medium pressure and external impacts. Common materials include no

n-magnetic stainless steel, fiberglass, high-strength plastics, etc. The function of an electrode is to generate an induced potential signal proportional to the flow rate of the measured medium. Its design needs to meet the following conditions: material selection: usually non-magnetic stainless steel (such as 316L) is used to ensure that the electrode is not disturbed by magnetic fields; Structural requirements: The electrode surface should be flush with the lining inside the measuring tube to avoid eddy currents or pressure losses during fluid flow; Installation position: The electrodes are generally symmetrically installed on both sides of the measuring tube to detect the induced potential perpendicular to the magnetic field direction. The lining is located on the inner side of the measuring catheter and the sealing surface of Fakefenglan, in direct contact with the measured medium. Its core functions include: electrical insulation: preventing induced potential from being short circuited by metal conduits; Corrosion resistance: protect the conduit from chemical corrosion by the medium; Wear resistance: prolongs service life, especially suitable for media containing solid particles. Common materials include rubber, fluoroplastics (such as polytetrafluoroethylene), ceramics, etc., which need to be selected according to the characteristics of the medium (such as temperature, corrosiveness). The outer shell is used to protect electromagnetic sensors (magnetic circuit systems, measuring conduits, electrodes) from external environmental influences such as mechanical damage, moisture, or corrosive gases. The shell material is usually metal (such as stainless steel) or high-strength plastic, and it needs to have sealing and p

Composition of flow meter | Structure and principle of elliptical gear flow meter

What are the components of an electromagnetic flowmeter for "knowledge sharing"?

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