Summary of Flow Meter | Electromagnetic Flow Meter

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1. Advantages, disadvantages and applications of electromagnetic flowmeter

Advantages, disadvantages and applications of electromagnetic flowmeter Electromagnetic flowmeter is a flow measurement instrument designed based on Faradays law of electromagnetic induction, which calculates the flow rate by measuring the induced electromotive force generated by the flow of conductive liquid in a magnetic field. Its technological breakthrough began in the 1970s and 1980s and has now become one of the most widely used types of flow meters. Advantages: Strong anti clogging ability, suitable for complex fluid measurement channels with smooth straight pipe structures, no mechanical moving parts, and not easily blocked by solid particles. Especially suitable for measuring liquid-solid two-phase fluids containing solid particles, such as pulp, mud, sewage, etc. No pressure loss, significant energy-saving effect. No additional resistance is generated during the measurement process, and the pressure loss is minimal when the fluid passes through, which can reduce system energy consumption and is suitable for industrial scenarios that require long-term operation. Strong anti-interference ability and high measurement stability. The measured volume flow rate is almost unaffected by significant changes in fluid density, viscosity, temperature, pressure, and conductivity, and can still maintain stable measurement under complex working conditions. Wide range of measurement, suitable for various calibers, large flow measurement range, wide coverage range of calibers (from small calibers to large pipelines), can meet the needs of systems of different scales. Excellent corrosion resistance. The non-contact measurement principle is adopt

ed, and the sensor does not directly contact the fluid. It can be used for measuring highly corrosive fluids by selecting corrosion-resistant material liners (such as polytetrafluoroethylene) and electrodes (such as Hastelloy). The disadvantage is that it is sensitive to conductivity and cannot measure liquids with low conductivity (such as petroleum products and organic solvents) in limited application scenarios. Due to the proportional relationship between induced electromotive force and conductivity, low conductivity fluid signals are weak and difficult to accurately detect. Not suitable for gases or liquids containing large bubbles. Gases or liquids containing a large number of bubbles can cause fluctuations in induced electromotive force, significantly increase measurement errors, and even malfunction. The lining materials of sensors with poor adaptability to high temperature environments, such as rubber and polytetrafluoroethylene, typically have a temperature resistance upper limit of less than 150 ℃. High temperature fluids may cause deformation of the lining or damage to the electrodes, limiting their application in high temperature conditions. Application field: Large caliber instruments are used for flow monitoring of urban water supply and drainage pipelines in water supply and drainage engineering, which can operate stably for a long time and have low maintenance costs. Small and medium-sized instruments: For high demand or difficult to measure applications in the steel industry, accurate measurement of water flow rate is required for blast furnace tuyere cooling water control to ensure equipment safety. Paper industry: Measuring the flow rate of pulp and black liquor to adapt to the characteristics of high

Summary of Flow Meter | Electromagnetic Flow Meter

1. Advantages, disadvantages and applications of electromagnetic flowmeter

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