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Spitzer and Boyes, LLC Website




This issue sponsored by Spitzer and Boyes, LLC

January 2015

Part 1: When Do You Measure Mass Flow?

I gave a class in basic flow measurement the other night, and one of the attendees asked me a question that should have made me pause. He said that one of his clients had given him a requirement to write a specification for a flowmeter to be installed downstream from a pump. It was a Coriolis mass flowmeter. I asked him what the fluid was, and he said that it was plain water at ambient temperature and reasonable pressure. click for more...

What's Wrong with VFDs? Why is There Limited Adoption of VFDs in the Process Industry?

Dick Caro presents a number of valid explanations for why there is limited adoption of VFDs in the process industry: lack of literature and textbooks on the application of VFDs; users are not aware of VFD technology and benefits; suppliers do not market VFDs to the process industries in part because users do not actively seek VFDs. click for more...

Typical Liquid Flow Velocity in a Pipe

What is the typical design velocity of a liquid flowing in a pipe? A. 1 meter per second, B. 3 meters per second, C. 5 meters per second, D. Any of the above. click for more...



In addition to over 35 years of experience as an instrument user, consultant, and expert witness, David W Spitzer has written over 10 books and 250 articles about flow measurement, level measurement, instrumentation, and process control. David (with Walt Boyes) is the author of seven Consumer Guides to various industrial flow and level technologies. David teaches his flow measurement seminars in both English and Portuguese.

Spitzer and Boyes, LLC provides engineering, technical writing, training seminars, strategic marketing consulting, distribution consulting, and expert witness services worldwide, and can be contacted at +1.845.623.1830 or www.spitzerandboyes.com.


ISSN 1538-5280
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