Magnetic Flow Meters Explained | Working Principle

Magnetic flow meters (mag meters) provide simple, proven, and reliable flow measurement
of electrically conductive liquids across many applications.

What Are Magnetic Flow Meters?

Magnetic flow meters, also known as mag meters or electromagnetic flow meters, are obstructionless, uni-directional or bi-directional, volumetric flow meters that can be used in a variety of field applications. Mag meters are usually chosen for their ability to manage critical flow applications for electrically conductive liquids and fluids.

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Obstruction Less Magnetic Flow Meter
Bi-directional magmeter for Oil and Gas

Advantages of Magnetic Flow Meters

OleumTech Electromagnetic Flow Meters deliver the exceptional performance and precision required for the most challenging flow measurement applications.
  • Reduced Maintenance Costs. OleumTech Magnetic Flow Meters have no moving parts or obstructions, minimizing maintenance requirements and eliminating pressure drop.
  • High Accuracy. Provides a reference accuracy of ±0.2 % of the reading.
  • Advanced Features. Smart self-detection and self-diagnosis for checking magnetized signal, empty pipe, and contaminated electrode.

How Do Mag Meters Work?

WORKING PRINCIPLE: FARADAY'S LAW

Electromagnetic flow meters utilize the principle of Faraday’s Law of Electromagnetic Induction to measure the velocity of liquids. According to Faraday’s Law, if a conductive fluid passes through a magnetic field, it will produce an electric signal within the conductor that is directly proportional to the process fluid’s flow velocity in the magnetic field.

This principle is mathematically defined as E = k*B*D*V. The induced voltage (E) is directly proportional to the flow velocity (V) of the fluid traveling through the magnetic field (B).

HOW IT WORKS: FLOW MEASUREMENT

Mag meters consist of a transmitter and a sensor that is placed inline to measure the induced voltage generated by the process fluid moving through a pipe. The transmitter converts the voltage generated by the sensor into a flow measurement which it then transmits to a control system.

Common Magnetic Flow Meter Applications

Magnetic flow meters are an ideal choice for measuring electrically conductive liquids across nearly any industry, including Oil & Gas, Water/Wastewater, Chemical/Petrochemical, and Food & Beverage.

Magnetic Flow Meter monitoring produced water flow

Produced Water Flow Measurement Solution for Oil and Gas

Measure flow of produced water with OleumTech Mag Meters

oleumtech mag meter on h pump saltwater disposal application

Accurate & Reliable Flow Metering Solution for Saltwater Disposal Systems

OleumTech Mag Meters chosen to replace failing flow meters from another manufacturer on the suction side of saltwater disposal h-pumps