Electromagnetic Flow Meters from Sur-Flo Meters & Controls

Electromagnetic flow meters, often called mag meters, use a magnetic field and a pair of electrodes to measure the flow of conductive liquids without any moving parts in the flow path. That design means no pressure loss, minimal wear, and long-term measurement accuracy that isn’t affected by density, temperature, pressure, or viscosity changes.

Sur-Flo Meters & Controls supplies electromagnetic flow meters across the SM2000, SM3000, and SM4000 model series, giving operations a range of options to match specific process, accuracy, and communication requirements. A wide selection of liner and electrode materials helps ensure maximum compatibility with your fluid chemistry and minimum maintenance over a long operating period.

How Electromagnetic Flow Meters Work

The meter body is a tube lined with a non-conductive material. Outside the tube, energized electromagnetic coils generate a magnetic field across the full diameter of the pipe. Electrodes positioned perpendicular to the coils detect the voltage induced as the conductive fluid moves through that magnetic field. That signal is directly proportional to flow velocity, which the meter’s processor converts into rate and total flow data.

Because there are no moving parts in the flow stream, there is no pressure loss, and accuracy is not affected by changes in temperature, pressure, density, or viscosity. This makes electromagnetic meters a strong fit for demanding industrial and municipal applications where long-term reliability matters.

Electromagnetic Meters vs. Other Flow Measurement Technologies

Electromagnetic meters require the fluid to have minimum electrical conductivity and full pipe contact with the electrodes. That makes them a strong choice for clean-to-moderately-loaded conductive liquids.

For high-debris, abrasive, or scaling service where a mechanical meter’s simplicity is an advantage, see Sur-Flo Conventional Turbines and  SF1015 Paddle Meter. For applications where installing a meter inline isn’t possible, or the process can’t be shut down, see the Clamp-On Ultrasonic Meter, which measures from outside the pipe with no wetted components.

SM2000, SM3000, and SM4000: Choosing the Right Model

Sur-Flo Meters & Controls offers electromagnetic flow meters across three series to fit different process requirements. Contact our team to determine the right model, size, and configuration for your application.

SM2000 The SM2000 is built on years of research and field use of electromagnetic flow meter technology. It features processor-based signal conversion with accuracy of ±0.25 percent and is available in sizes from 0.25 to 54 inches. The SM2000 uses a pulsed DC magnetic field for zero point stability, offers corrosion resistant liners for long service life, and includes empty pipe detection and power loss totalization. It is NSF listed and CSA certified.

SM3000 The SM3000 delivers accuracy better than ±0.25 percent with a flow range of 300:1. It is virtually unaffected by density, temperature, pressure, and viscosity changes, and complies with ANSI/NSF Standard 61, Annex G. The SM3000 is available in sizes from 1/4 inch to 24 inches, with liner options including PFA, PTFE, Halar, and hard rubber to match a range of fluid chemistries and temperature conditions.

SM4000 The SM4000 is part of Sur-Flo’s M-Series electromagnetic flow meter lineup, built on the same core Faraday’s law measurement principle as the SM2000 and SM3000. Contact our team for full specifications, sizing, and configuration details for the SM4000.

What Electromagnetic Flow Meters Are Used For

Electromagnetic flow meters from Sur-Flo Meters & Controls are used wherever accurate, low-maintenance flow measurement of conductive liquids is required.

• Municipal water and wastewater treatment
• Industrial process lines carrying conductive liquids, slurries, or pastes
• Chemical processing applications requiring precise rate and totalization
• Applications where pressure loss from inline moving parts is a concern
• Long-term installations where minimal maintenance is a priority

Industries Electromagnetic Flow Meters Serve

Municipal Water and Wastewater Treatment plant and utility metering applications requiring reliable, low-maintenance flow measurement.

Industrial Process Process lines carrying conductive liquids, slurries, or pastes where pressure loss and maintenance downtime are concerns.

Chemical Processing Applications requiring precise, repeatable rate and total flow measurement across varying process conditions.

Why Operations Choose Electromagnetic Flow Meters

• No moving parts in the flow stream, eliminating a common source of wear and pressure loss
• Accuracy unaffected by changes in density, temperature, pressure, or viscosity
• Wide range of liner and electrode materials to match fluid chemistry
• Multiple model series (SM2000, SM3000, SM4000) to fit different accuracy, sizing, and budget needs
• Long operating life with minimal maintenance requirements
• Vast flow range capabilities (300:1 ratio in most cases)

Supplied by Sur-Flo Meters & Controls

Sur-Flo Meters & Controls supplies electromagnetic flow meters to operations across Western Canada and beyond. Our team works directly with engineering, operations, and procurement teams on model selection, sizing, and configuration to match your specific process conditions.