Electromagnetic Flowmeters

Flow, whether volumetric or mass, is one of the most measured variables in industrial processes. Water, natural gas, steam, oil, chemicals, and wastewater are just a few examples of the different liquids or gases that are measured on a daily basis. As there is no universal technology suitable for all of these applications, we offer you the support to choose the right tecnology and sizing.

Electromagnetic Flowmeters

Measurement Principle

Faraday's law of induction states that when a conductor moves in a magnetic field it induces electrical voltage. When electrically charged particles in the fluid pass through the magnetic field generated by two coils in the sensor body, an electrical voltage is induced that is captured by two measuring electrodes, which is directly proportional to the speed of the flow and, therefore, hence the volume of the flow.


Virtually independent measuring principle of process pressure, density, temperature and viscosity

Minimum conductivity 5 µS / cm2

Measurement even for fluids with suspended solids, e.g., Cellulose or mineral pulp

Nominal sizes available DN2 to DN2400 (1/12” to 96”), Max. 40 bar, - 40 to 180 °C

No moving parts and no pressure losses. Minimal maintenance and low cost of ownership

Measurement accuracy ± 0.5% standard and ± 0.2% optional. High rangeability and long-term stability

Materials, design and connections suitable for sanitary applications


Promag D
Basic for use in clean water.

Promag W
Versatile for water and waste water.

Promag P
Chemical and process applications.

Promag H
Hygienic applications.

Promag S
For non-homogeneous or abrasive fluids.

For small pipes diameters applications.

Compact with high repeatability for filler applications.

ECN Automation
offers comprehensive solutions.

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