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What Are The Advantages And Disadvantages Between A Mechanical Flow Meter And A Magnetic Flow Meter? (Part Two Of Two)

Source: Siemens Industry, Inc
What Are The Advantages And Disadvantages Between A Mechanical Flow Meter And A Magnetic Flow Meter?

In Part One of this series, we started the discussion of magnetic flow meters versus mechanical flow meters. We talked about the differences in construction and how a meter with moving parts can affect the total cost of ownership through maintenance and reduced performance. In this article, I want to address some of the mounting, accuracy and process considerations of mechanical meters compared to mag meters. Let’s look at process considerations first.

Mag meters are suitable for the measurement of conductive liquids. What do we consider a conductive liquid? For conductive liquids, we are specifically looking at liquids with conductivity of 5 microsiemen/cm or greater as suitable. Mag meters are also suitable for liquids with either suspended solids or slurries. This makes them ideal for water-based products and most acids and bases as well as slurries like the ones you find in wastewater treatment, mining, and pulp and paper applications. Mag meters are also very flexible when it comes to viscosity, but they are not suited for hydrocarbon-based products, gases or steam. With hydrocarbon-based products, there is just not enough conductivity present for a mag meter to work.

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