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More information?

More information about flowmeter or are you looking for a special electromagnetic flowmeter? Please contact our Sales Engineers!

TEESING SALES ENGINEERS
NL: +31 70 413 07 50
CN: +86-(0)10-60576210
USA: +(1) 973 383 0691
TW: +886-(0)3-5600560

Operation of electromagnetic flowmeters

Electromagnetic flow meters are based on Faraday's law. Professor Faraday showed that a response voltage is generated in the conductor when it is moved in a magnetic field. The flow meter consists of an open tube with an electrically insulating material inside. At the top and bottom side there are coils that create a magnetic field. Then there are 2 electrodes arranged perpendicular to the magnetic field lines. When a conductive medium flows through the tube, a voltage is measured on the electrodes that is proportional to the velocity of the liquid.

De formula is U = v . B . D

Werking van een elektromagnetische flowmeter

U = the measured voltage through the electrodes
v = the speed of the medium
B = the magnetic field strength
D = the distance between the electrodes, in this case the diameter of the measuring tube

ADVANTAGES OF ELECTROMAGNETIC FLOWMETERS:

  • From DN2 to DN3000
  • No obstruction in the flowmeter
  • No moving parts
  • Maximum pressure up to 1000 bar
  • Maximum temperature up to 180 °C
  • Accuracy of 0.5% of the measured value

Applications

  • Liquids that are electrically conductive

Electromagnetische flowmeter