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Electromagnetic Flow Meters

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One way to understand the way that electromagnetic flow meters work is by considering Faraday’s Law of electromagnetic induction. Faraday’s Law states that, as it moves at right angles through a magnetic field, the voltage produced by a conductor is proportional to its (the conductor’s) velocity. Read More…

Electromagnetic Flow Meters Electromagnetic flow meters, also known as magnetic flow meters, mag meters, or even electromags, are a type of volumetric flow meter. They determine flow rate using a magnetic field that is applied directly to the metering tube. This magnetic field creates a potential difference that is proportional to the velocity of the fluid flow inside the tube, perpendicular to the flux lines. The meters measure this difference in order to get the flow rate. They do so using sensing electrodes that applied to the magnetic field in such a way that they are aligned perpendicularly to the flow.
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Leading Manufacturers

Monterey, CA  |  831-373-0200

Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Customers choose Sierra when they need an accurate and repeatable flow measurement, short delivery lead times, expert flow advice and long term support. When it matters, choose Sierra. Visit www.sierrainstruments.com.

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Sierra Instruments $$$

Sturtevant, WI  |  262-886-2695

SIKA is a developer and manufacturer of flow control products and a wide variety of other measuring and monitoring systems. Our inventory includes flow sensors, flow meters, flow switches, and many more. We know that flow solutions aren't one-size-fits-all, which is why we provide consultation and flow management solutions that are individualized and customized to your requirements. When you choose SIKA, you will receive efficient, durable products and customer service tailored to your needs.

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SIKA USA $$$

Itasca, IL  |  888-539-3623

Keyence is a leading supplier of flow meters and many other automation components. Our flow meters are compatible with everything from compressors to receiving tanks to machine drop points, while measuring both overall usage and costly leakage amounts. Additional features include multiple numerical and graphical data displays. Visit our website to find out more about our products.

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Keyence Corporation of America $$$

Wilmington, NC  |  910-392-2490

Since 1984, Eastern Instruments has been engaged in the development of solid particle mass and airflow measuring and control systems for clients in the food, petrochemical and agricultural industries. Many of the “legend” companies use Eastern Instruments’ in-processes, making brands that touch the lives of millions every day.

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Eastern Instruments $$$
placeholder image Sierra Instruments SIKA USA Keyence Corporation of America Eastern Instruments

In flow meter terms: electromagnetic flow meters use signal voltage in order to determine velocity, where the flow rate of the conductor is the fluid. For this reason, it is essential that the fluid used with electromagnetic flow meters is conductive and water based. In addition, the pipe in which the fluid flows must have a nonconducting liner. The electrodes must not be allowed to corrode.

These flow meters only work with conductive and water-based fluids. They’re ideal for measuring flow rate of dirty liquids. However, they can work with a wide range of fluids; in fact, they are widely considered the third most common type of flowmeter. This is largely due to the fact that they have no moving parts, which means that they require less maintenance, and tend to last longer.

Because electromagnetic flow meters can only be used with conductive, water-based fluids, before making the decision to purchase one, ask yourself the following questions about your application: Does my application used conductive fluid? Is my application fluid abrasive? What is the minimum and maximum flow rate of my application? Is my pipe always full?

Even if you ask yourself all the right questions, the only way to know without a doubt that this type of flow meter is right for you is by talking over your application with an experienced flow meter manufacturer. In fact, a good manufacturer, like one of those we have listed on this site, will be able to provide you with a custom flow meter, if you wish.

Electromagnetic Flow Meter Informational Video