An electromagnetic flow meter is a mass or volumetric flow meter that measures the velocity of liquids in a tube or pipe using electrodes connected to the liquid flow. Electromagnetic flow meters have a special design that allows them to take readings without the need for any moving parts. Its specific feature helps it measure high-pressure applications without worrying about seepage or leakage.

Temperature, pressure, liquid viscosity, or liquid density do not affect the consistency and accuracy of electromagnetic flow meters. This special instrument makes it simple and efficient to measure viscous materials.

Electromagnetic flow meters are sometimes referred to as mag meters or magnetic flow meters by engineers. Mag meters are the most common of the three interchangeable names.

How Do Magnetic Flow Meters Work?

The magnetic field that a mag meter produces acts as the basis for measuring and computing the flow of a conductive liquid. When the flow's velocity increases, so does the voltage it generates, which sends a signal to the meter. The speed or velocity of a conductive liquid or fluid as it flows through a pipe or duct is essentially measured by an electromagnetic flow meter.

There are several flow sensors and meters available. The features and leading electromagnetic flow meter working principle are outlined in this section.

The Electromagnetic Flow Meter Working Principle

Using Faraday's law of induction, electromagnetic flow meters detect the flow of fluid.

An electromagnetic flow meter has electrodes that register electromotive force and an electromagnetic coil that creates a magnetic field (voltage). As a result, the flow may be measured regardless of whether there appears to be nothing within the flow pipe of an electromagnetic flow meter.

According to Faraday's law of induction, conductive liquids in motion inside a magnetic field generate an electromotive force (voltage) in which the inner diameter of the pipe, the strength of the magnetic field, and the average flow velocity are all proportional.

In other words, electricity is generated from the flow velocity of a liquid traveling through a magnetic field. V, B, and D are all proportional to E.

The Electromagnetic Flow Meter Formula

Electromagnetic flow meters measure flow using electromagnetic induction according to Faraday's law. In Faraday's law, whenever a conductor of length l moves at a speed v perpendicular to a magnetic field B, an electromotive force e is produced in a direction that is also perpendicular to both of them.

This electromotive force is given by the equation

e = Blv... (eq1),

where B is the magnetic flux density (Wb/m2)

L stands for length (in meters),

and V for velocity (in meters per second).

The formula for the volume flow rate Q (electromagnetic flow meter formula) is:

Q = (d2/4) v... (eq2),

where d is the pipe's diameter and v is the average flow speed (conductor velocity in this case)

from the equation (eq1)

v = e/Bl

Q = πd2e/4Bl

Q+Ke,

and K is the meter constant.

The induced electromotive force is inversely correlated with the volume flow rate.

Electromagnetic flow meter manufacturers in India and electromagnetic flow meter suppliers have leveraged the advantages of electromagnetic flow meter which makes it useful in multiple industries.

The Electromagnetic Flow Meter Advantages

• The electromagnetic flow meter's output voltage changes with the liquid flow rate in a linear way.
• The varying liquid characteristics, such as viscosity, pressure, temperature, etc., do not affect the output.
• Slurries, grease, and corrosive fluids may all be measured using an electromagnetic flow meter.

It acts as a bidirectional meter. The electromagnetic flow meter can also measure the extremely low flow rate. The industries that deal with fluid flow have begun relying on mag meters as an effective method for computing and detecting liquid flow as they've become more accurate and precise. The need has increased the usage of electromagnetic flow meters.

These were the electromagnetic flow meter working principle and flow meter formula. These electromagnetic flow meter advantages include mag meters in the widest range of liners, electrodes, and sizes that make them available for various uses in the industry as mentioned in Electromagnetic Flow Meter and its Applications. Atlantech is one of the most rapidly expanding electromagnetic flow meter suppliers and electromagnetic flow meter manufacturers in India.