Advantages and disadvantages of Germany E + H electromagnetic flowmeter

Case introduction

The advantages and disadvantages of the German E+H electromagnetic flowmeter

The electromagnetic flowmeter is an instrument for measuring conductive liquids based on Faraday's law of electromagnetic induction. Electromagnetic flowmeters have a series of advantages and can solve problems that are difficult to apply with other flowmeters, such as the measurement of dirty flows and corrosive flows. There were major technological breakthroughs in electromagnetic flow in the 1970s and 1980s, making it a widely used type of flow meter, and its usage percentage among flow meters continues to increase.

Advantages: (1) The measurement channel is a smooth straight tube that will not be blocked and is suitable for measuring liquid-solid two-phase fluids containing solid particles, such as pulp, mud, sewage, etc.: (2) No generation of The pressure loss caused by flow detection has a good energy saving effect: (3) The measured volume flow is actually not significantly affected by changes in fluid density, viscosity, temperature, pressure and conductivity: (4) The flow range is large and the caliber range is wide : (5) Corrosive fluids can be used. Disadvantages: (1) It cannot measure liquids with very low conductivity, such as petroleum products; (2) It cannot measure gases, steam and liquids containing large bubbles; (3) It cannot be used at higher temperatures. Application overview: Electromagnetic flowmeters have a wide range of application fields. Large-diameter instruments are mostly used in water supply and drainage projects; medium- and small-diameter instruments are often used in high-demand or difficult-to-measure situations, such as blast furnace tuyere cooling water control in the steel industry, and measurement of pulp liquid and black liquor in the papermaking industry. Strong corrosive liquid in the chemical industry, ore slurry in the non-ferrous metallurgical industry; small diameter and micro diameter are often used in the pharmaceutical industry, food industry, biochemistry and other places with hygienic requirements.