# What is the principle of magnetic flow meter?

Table of Contents

## What is the principle of magnetic flow meter?

The flow principle behind magnetic flow meters is known as Faraday’s Law, mathematically defined as E=k*B*D*V. The induced voltage (E) is directly proportional to the velocity (V) of the fluid moving through the magnetic field (B). The induced voltage is carried to the transmitter through the electrode circuit.

### How does magnetic flow transducer work?

Magnetic flow meters works based on Faraday’s Law of Electromagnetic Induction. According to this principle, when a conductive medium passes through a magnetic field B, a voltage E is generated which is proportional to the velocity v of the medium, the density of the magnetic field and the length of the conductor.

Are magnetic flow meter bidirectional?

The magnetic flowmeter can also be used for bidirectional flow measurement. It has the advantages of no pressure drop, linear output, short inlet/outlet pipe runs (5 diameters upstream of the electrode plane and 2 diameters downstream), and good turndown.

What is the minimum conductivity required for magnetic flow meter?

5 µS/cm
A magnetic flow meter, also referred to as mag flow meter or magmeter, is a volumetric flow meter that measures liquids or liquid slurries that have a minimum conductivity of 5 µS/cm. Magnetic flow meters will typically not work with hydrocarbons, distilled water, non-aqueous solutions and non-conductive solutions.

## How does a magnetic flowmeter register water flow?

Magnetic flowmeters also can be packaged as probes and inserted into process pipes through taps. These probes contain both the electrodes and magnetic coils. The flowing process fluid induces a voltage at the electrodes, which reflects the velocity at the probe tip and not the average fluid velocity across the pipe.

### What are the application of magnetic flow meter?

Magnetic flowmeters are used in water treatment plants to measure treated and untreated sewage, process water, water and chemicals. Mining and mineral process industry applications include process water and process slurry flows and heavy media flows.

What is the unit of magnetic flow meter?

Magnetic flowmeters measure the velocity of conductive liquids in pipes, such as water, acids, caustic, and slurries. Magnetic flowmeters can measure properly when the electrical conductivity of the liquid is greater than approximately 5μS/cm.

Why do we use liner in magnetic flow meter?

Lining is important in order to efficiently detect generated very low electromotive force levels and ensure corrosion and abrasion resistance to the fluids being measured. The material for lining is selected according to the type of fluid to be measured.

## What is Coriolis law?

The Coriolis force applies to movement on rotating objects. It is determined by the mass of the object and the object’s rate of rotation. The Coriolis force is perpendicular to the object’s axis. The Earth spins on its axis from west to east. The Coriolis force, therefore, acts in a north-south direction.

### What is Coriolis force in flow meter?

A Coriolis meter utilizes a measurement technology which is capable of directly measuring mass flow (instead of inferring mass flow from volumetric flow and density). The Coriolis effect is the subtle correction to the path of moving objects to compensate for the rotation of the earth.

What is electrode in flow meter?

The electrodes sense the EMF that is magnetically induced in the fluid which can then be used to determine flow rate. The EMF is measured by the flow meter using a differential front end amplifier connected across the electrodes. The potential of the process fluid is used as a reference for the differential amplifier.

• August 8, 2022