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DAVID W. SPITZER'S E-ZINE

TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS

This issue sponsored by Yamatake America, Inc.

NOVEMBER 2007

Magnetic Flowmeters (Part 2 of 3)

The magnetic flowmeter signal is proportional to the fluid velocity. Therefore, these flowmeters measure velocity, from which the volumetric flow rate is inferred utilizing the first equation, assuming that the cross-sectional area of the conduit is known. Magnetic flowmeter performance is therefore predicated on how well the average fluid velocity is measured and how well the cross-sectional area is known. Uncertainty in the cross-sectional area can degrade the inferred volumetric flow rate measurement. click for more...

Quiz Corner: Organizing Your Flow Investigation
Identifying the Root Cause of Measurement Error

The plant is having operational problems, and you are informed that an existing process gas flowmeter with pressure and temperature compensation appears to be measuring higher than it should. What instruments would you investigate to determine the cause of the problem? click for more...

Of Instrumentation Globalization
New Technology Makes Experienced Engineers Less Important

There are a number of trends in instrumentation (in general) and measurement (in particular) that seem to be converging. Whether this is good or bad can be a matter of opinion. click for more...

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