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Electromagnetic Flow Meters

Electromagnetic Flow Meters

Electromagnetic flow meters, also known as magmeters, are devices used to measure the flow of conductive liquids in pipes. These meters work on the principle of Faraday's Law, which states that when a conductive liquid flows through a magnetic field, a voltage is induced across the liquid. The voltage is proportional to the velocity of the liquid and is measured by electrodes located on the meter's surface. Electromagnetic flow meters have several advantages over other flow measurement techniques. They are highly accurate, reliable, and have a wide measuring range. Additionally, they are unaffected by changes in temperature, pressure, or viscosity, making them suitable for a variety of applications

Electromagnetic flow meters are commonly used in industries such as water and wastewater treatment, chemical processing, and food and beverage production. They can be used to measure the flow rate of liquids such as water, acids, alkalis, and slurries.

The meter consists of a flow tube, electrodes, and a transmitter. The flow tube is made of a non-magnetic material and contains a magnetic field. The electrodes are placed on the outside of the flow tube and are connected to a transmitter, which converts the voltage signal into a flow rate reading.



The flow tube diameter and electrode spacing are important considerations when selecting an electromagnetic flow meter. The diameter of the flow tube should be chosen based on the desired flow rate range and the pipe diameter. The electrode spacing should be chosen to ensure accurate measurement of the liquid flow.Electromagnetic flow meters come in various configurations, including insertion, flanged, and sanitary. Insertion flow meters are installed by cutting into the pipe and inserting the flow tube. Flanged flow meters are connected to the pipe using flanges, and sanitary flow meters are designed for use in food and beverage applications.

In conclusion, electromagnetic flow meters are highly accurate and reliable devices used to measure the flow rate of conductive liquids in pipes. They are widely used in various industries and have several advantages over other flow measurement techniques. The proper selection and installation of the meter are essential to ensure accurate measurement and optimal performance.

Salient Features :

  • Based on Faraday’s law of electromagnetic induction.
  • Flow tube sizes 10 mm to 3000 mm and above
  • Coil assembly in hermetically sealed welded construction
  • Integral or remote transmitter
  • Field interchangeable electronics
  • High linearity due to characteristic magnetic field
  • Absolute zero stability and noise elimination due pulsed DC excitation
  • High long-term stability and reliability

Applications :

  • Based on Faraday’s law of electromagnetic induction.
  • Flow tube sizes 10 mm to 3000 mm and above
  • Coil assembly in hermetically sealed welded construction
  • Integral or remote transmitter
  • Field interchangeable electronics
  • High linearity due to characteristic magnetic field
  • Absolute zero stability and noise elimination due pulsed DC excitation
  • High long-term stability and reliability

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