Flow Meters & Metering Systems

McCrometer Electromagnetic Flow Meters

Electromagnetic flow meters (or mag meters) are volumetric flow meters that do not have moving parts that wear, ultimately reducing the need for maintenance and replacements. Accuracy on these flow meters on a wide flow range can be near an average of +/- 0.5% or better. They include an obstruction-free design, eliminating flow impediment, and operating with the electrodes on opposite sides of the flow to better read signals. They perform well in municipal and processing applications and have become the top meter for measuring conductive liquids.


Mag flow meters work by utilizing Faraday’s Law of Electromagnetic Induction to measure liquid velocity. This principle states that conductors moving through magnetic fields produce electric signals in conductors that are proportional to the water moving through the field’s velocity. The fluid moves through the magnetic field, and conductive particles create a change in voltage. It is used to measure the velocity of water flow in the pipe.


McCrometer offers different meters, but some common questions about their products include:


  • Does McCrometer offer flanged spooling for insertion mag meters? Yes, the most common sizes are 4 inches to 36 inches. If larger than that, McCromoter will have to review with their engineering and manufacturing team to get you the correct size.

  • What output options are available for mag meters? They vary based on the product line, but the most common are 4-20mA, Pulse, Modbus, Hart, and smart outputs such as Sensus, Itron 6, iTron 9, and Neptune compatibility.

  • Why does McCrometer not use a conventional liner? Conventional liners do not permanently affix to meters, which risk delamination, or separation from the meter, causing significant damage. Instead, they use fusion-bonded epoxy, which creates a barrier between the meter and fluid, eliminating delamination risk.


For more information on McCrometer’s mag meters, view their video on mag meter FAQs.


The Avanti Company provides on site flow meter testing. For more information, please call us at 800.284.5231.

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