Magnetic Precision: Flow Measurement Without Moving Parts

Electromagnetic flow meters, or mag meters, are a proven and highly effective technology for measuring the flow of conductive liquids in water, wastewater, and industrial applications. With no moving parts and no obstructions in the flow path, they provide reliable, long-term operation and require minimal maintenance. In this expert interview, Joseph Incontri, Marketing Director at KROHNE North America, explains how mag meters work, where they excel, and what considerations are necessary for optimal performance. From their wide range of sizes and material options to seamless compatibility with digital protocols like HART, mag meters offer precise volumetric measurement and easy integration into control systems. Innovations such as virtual reference technology and in-field verification further improve reliability and ease of use. Additionally, DC pulsed excitation significantly reduces power consumption compared to older AC models, enhancing sustainability. While limitations exist—such as the need for conductive fluids and proper installation—modern mag meters remain a cost-effective, durable, and highly accurate choice for many flow applications.