The Magnetic Flow Meter (Mag Meter) is a widely used field instrument in municipal and industrial water treatment plants for precise and continuous measurement of water flow. These meters are particularly suitable for SCADA-based automation systems, where accurate real-time flow data is essential for process optimization, chemical dosing, pump control, and regulatory compliance. The technology is based on Faraday’s Law of Electromagnetic Induction, where a magnetic field is applied to the conductive liquid, generating a voltage proportional to the flow velocity. This voltage is converted into a signal that is transmitted to PLCs, RTUs, and SCADA software for monitoring and control.
Magnetic flow meters are ideal for applications involving raw water, potable water, wastewater, and slurry-laden liquids. Because they have no moving parts, they offer extremely low maintenance requirements, high reliability, and long-term stability. The sensor consists of a lined flow tube with electrodes mounted perpendicular to the magnetic field and pipe axis, while the transmitter conditions the signal and outputs standard communication signals such as 4–20 mA, HART, Modbus, or Profibus, enabling seamless SCADA integration.
Installation points typically include main influent pipelines, pump station outputs, chemical dosing streams, and effluent discharge points. Continuous flow monitoring enables SCADA systems to trigger automated control sequences such as pump ramping, chemical dosing adjustments, or diversion for overflow protection. The historical data collected is used for trend analysis, performance optimization, and compliance reporting. Mag meters are insensitive to changes in liquid density, viscosity, or temperature, provided the liquid is conductive, which makes them highly versatile for a wide range of water and wastewater applications.
Endress+Hauser Promag 10 Magnetic Flow Meter Datasheet (PDF) https://www.endress.com/medias/Promag-10-Datasheet-EN?context=bWFzdGVyfGRhdGFzaGVldHwyMTg0MDd8Y29udGVudC9wZGYvaGRmL2g2Ni85NjQ1MDAwMDMxMjc0L0RhdGFzaGVldF9Qcm9tYWdfMTBfRU4ucGRmfDI1YjY2YmQxMjVkZDg5ZjFmODIxN2Q4ZDQ0YjViNTNhNjdkNDI1YzA1ZTJjYzE5YmVjZjIwZGE1ZmFlZDQyZGM