Mag Meter Installation Cost, Care & Calibration Options

Aug. 26, 2019

Learn how McCrometer's mag meters, offered in various design options, can help navigate best with your installation cost, care and calibration needs.

Because all mag meters share a common technology based on Faraday’s Law, their operation is reliable and relatively unaffected by turbulence-inducing conditions. Different product construction formats, however, create performance characteristics that make some designs better suited for certain applications.

Full-Bore Mag Meter

This design creates an electromagnetic field within a pipe cross-section to deliver to greater than or equal to 0.5% flow measurement accuracy. As a non-invasive design that leaves the pipeline cross-section completely unobstructed, it accommodates fluid ranging from clean water to wastewater influent and even waste-activated sludge. While its flanged format is reasonably convenient to install in new construction, replacing it or removing it for calibration in a continuous operation can become problematic and expensive, especially as pipeline size increases (Figure 1). This can become even more difficult in vaults and other hard-to-access locations, and particularly is challenging for large line sizes.

Full Profile: Insertion Mag Meter

This design senses flow at multiple locations across the full diameter of the pipe to deliver long-term accuracy to greater than or equal to 0.5% in clean water conditions (Figure 2). Hot-tap installation and maintenance convenience can save 45% on installation and total cost of ownership as compared to full-bore mag meters.

Single Profile: Insertion Mag Meter

While affordable, single-profile insertion mag meters do offer hot tap convenience, their single measurement location limits accuracy to greater than or equal to 2% of scale because it cannot account for flow variations across the entire cross-section of the pipe (Figure 3).

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