The Operating Principles of a Magnetic Flowmeter

Below is a video, courtesy of Badger Meter, illustrating the operating principles of magnetic flowmeters (also known as magmeters).

A magnetic field is applied to the flow tube, resulting in an EMF proportional to the flow velocity passing perpendicular to the magnetic flux lines. The physical principle at work is Faraday's law of electromagnetic induction.

Magnetic flow meter requires a conductive fluid, and electrically insulated internal pipe surfaces to operate.

Advantages:
  • Low maintenance cost
  • No moving parts
  • Good for slurry
  • Good for corrosive fluids
  • Very linear
  • Minimal flow restriction

Disadvantages:
  • Requires electrically conductive fluids
For more information on magmeters, visit TECO at http://www.teco-inc.com of call 800-528-8997.