• Introduction

An electromagnetic flowmeter, often referred to as a “magmeter,” is a volumetric flow measurement device that operates based on Faraday’s Law of Electromagnetic Induction. It consists of a non-conductive liner and a pair of electrodes embedded in a flow tube, which is surrounded by electromagnetic coils that generate a magnetic field. As a conductive liquid—such as water, acids, or slurries—passes through this magnetic field, it induces a voltage that is directly proportional to the velocity of the fluid. Because the device has no moving parts and provides an unobstructed flow path, it is highly valued in industrial applications for its minimal pressure drop, low maintenance requirements, and ability to handle corrosive or abrasive media with high accuracy.

  • Working Principles

The working principle of an electromagnetic flowmeter is based on Faraday’s Law of Electromagnetic Induction, which states that a conductor moving through a magnetic field produces an electrical signal. In this application, the conductive liquid serves as the conductor. The meter’s coils generate a constant magnetic field across the pipe’s cross-section; as the fluid flows through this field, it induces a voltage perpendicular to both the flow direction and the magnetic field. This induced voltage, detected by electrodes mounted on the pipe walls, is directly proportional to the average velocity of the liquid (V) according to the formula E = kBDV (where E is the voltage, B is magnetic field strength, and D is the distance between electrodes). A transmitter then processes this voltage to calculate the volumetric flow rate, offering a measurement that is independent of fluid density, viscosity, or pressure.

  • Applications

Electromagnetic flowmeters are essential in industries that handle conductive liquids, especially where maintaining flow integrity and reducing maintenance are priorities. Their applications include:

  • Water and Wastewater Management

  • Chemical and Petrochemical Processing

  • Food and Beverage Production

  • Pulp and Paper Industry

  • Mining and Minerals

  • Pharmaceutical Industry

  • HVAC Systems

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Electro Magnetic Flow Meter SSEAMFI

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SKU: SSEAMFI
The Schmierer SEA Electro Magnetic Flowmeter Range is based on Faraday's Law of Electromagnetic Induction. When the conductive fluid flows through a magnetic field of the sensor, an electric voltage proportional to the volume flow is generated between the pair of electrodes and transmitted to the output device. The flow and volume will be displayed at the electronic transmitter No disturbance or restriction of flow No moving parts - no wear and tear, virtually no pressure loss Insensitive to fluid density, temperature, pressure, viscosity Can be used for different types of conductive liquids (calibration with water required) download pdf datasheet
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Electro Magnetic Flow Meter SSEAMFII

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SKU: SSEA MFII
The SSEAMFII series electromagnetic flowmeter is suitable for the conductive medium with a conductivity higher than 5μs / cm. It is composed of the sensor and converter, and the sensor consists of measuring tube, electrodes, excitation coils, iron core and shell and other components. After the traffic signal is amplified, processed and operated by converter, you can see the instantaneous flow, cumulative flow, output pulse, analog current and other signals for the measurement and control of fluid flow. It adopts the smart converter so that it not only has the measurement, display and other functions, but also supports the remote data transmission, wireless remote control, alarm and other functions. ◆ Excellent measurement repeatability and linearity ◆ Good reliability and anti-interference performance ◆ Good pressure resistance sealing ability ◆ Low pressure loss measurement tube ◆ High intelligentization ◆ Maintenance-free download pdf datasheet
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Electro Magnetic Flow Meter SSEAMFIII

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SKU: SSEA MFIII
The SSEAMFIII Electro-Magnetic Flow meter is a volumetric FM with no moving parts - for conductive water-based liquids - ideal for waste water applications or any dirty liquid - low pressure drop and low maintenance - Max Temperature 180°C with PFA lining. download pdf datasheet
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Electro Magnetic Flowmeter SpiraMag

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SKU: SpiraMag
The field of application for all electromagnetic flowmeters of the SpiraMAG® series is the measurement of conductive liquids (>5µS/cm) like water, waste water in continuous flow measurement. The series comprises the nominal diameters DN 15 to DN 1000 and is available in the pressure stages PN 10/16/40. The standard maximum temperature is 60°C. download pdf datasheet
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Electro Magnetic Sanitary Flow Meter SSEAMFIII

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SKU: SSEA MFIII San
The SSEAMFIII Sanitary Electro-Magnetic Flow meter is one of the most flexible and universally applicable flow measurement systems available. It is volumetric flow meter which does not h ave any moving parts and is ideal for waste water applications or any dirty liquid which is conductive or water based. Magnetic flow meter is also ideal for the applications where low pressure drop and low maintenance are required. Max Temperature 180°C with PFA lining. download pdf datasheet