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.

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