The working principle of electromagnetic flow meter

Electromagnetic flow meters, often referred to as mag flow meters, are specialized devices designed for volumetric flow measurement in various applications, especially those involving wastewater and conductive fluids.

The uniqueness of these devices lies in their non-invasive nature and the absence of moving components, making them easy to maintain and ideal for low-pressure drop applications.

Defining Electromagnetic Flow Meters

Electromagnetic flow meters serve to quantify the movement of conductive liquids. They operate primarily on the principles outlined by Faraday's Law of Electromagnetic Induction, which illustrates the interaction between magnetic fields and electrical circuits to generate an electromotive force.

Operational Mechanism of Electromagnetic Flow Meters

An electromagnetic flow meter consists of a transmitter and a sensor. The sensor, integrated inline with the piping system, assesses the induced voltage as conductive fluid passes through. Subsequently, the transmitter translates this voltage into flow measurements—indicating that a higher flow rate results in increased voltage generation.

Advantages and Disadvantages of Electromagnetic Flow Meters

Here is a breakdown of the key advantages and disadvantages of deploying electromagnetic flow meters:

Advantages

• Energy-efficient with low power requirements
• Comprising no moving components, leading to higher reliability
• Versatile in accommodating a range of liquid types from clean water to slurries
• Featuring minimal pressure loss across the meter

Disadvantages

• Requires a minimum level of conductivity in the fluid
• Inapplicable for gas flow measurements
• Not suitable for extremely high temperature fluids
• May experience interference from external electromagnetic sources

Applications of Electromagnetic Flow Meters

Given their design—free from moving parts—electromagnetic flow meters excel in wastewater treatment scenarios and other conditions involving conductive or water-based liquids. Their maintenance ease further enhances their appeal; however, it is crucial to note their ineffectiveness in measuring hydrocarbons or distilled water.

The diverse range of applications coverage by electromagnetic flow meters includes water treatment, hygienic food production, pharmaceutical dosing operations, seawater studies, and Clean in Place (CIP) scenarios, all serviced by Bürkert’s offerings.

Varieties of Electromagnetic Flow Meters Offered by Bürkert

Bürkert provides two distinct categories of electromagnetic flow meters: insertion type and full bore models. The insertion models are tailored for neutral and mildly aggressive fluids with a conductivity threshold exceeding 20 µS/cm, while full bore versions cater to liquids with a minimum conductivity of 5 µS/cm.

Their insertion mag flow meters are crafted with FDA-compliant materials and are devoid of moving parts, making them suitable for Clean in Place applications, while full bore models are adept for both continuous and batch measurement needs.

Bürkert’s impressive experience of over 70 years in the fluid control field reflects its commitment to quality and expertise. In search of efficient, precisely engineered flow measurement solutions? Explore their extensive range of electromagnetic flow meters today.

We appreciate your interest in this concise exploration of how electromagnetic flow meters function. For further reading on flow measurement principles and other types of flow meters, please check out the accompanying articles.

For additional inquiries or details, reach out to Bürkert.

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