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This issue sponsored by Spitzer and Boyes, LLC

October 2018

Getting the Best from a Magnetic Flowmeter

Magnetic flowmeters are widely used flow measurement devices for many kinds of conductive liquids. There are simple reasons for this. First, magnetic flowmeters are inherently extremely accurate. They measure the average of all of the velocities traveling through the pipe, from wall to wall, directly as a function of Faraday's Law. Second, magnetic flowmeters are obstructionless, and have about the same pressure loss as an equivalent length of pipe. Third, they are remarkably maintenance free, even in cases of high corrosion or abrasion. Fourth, they can measure a wide range of fluids, from clean water to very dense slurries. click for more...

Control Valve Plugging

Often it helps to walk around and observe people at work. I once observed an operator get up, walk around his desk, put a controller in manual, open the control valve fully for about 30 seconds and then return it to its previous position before putting the controller back into automatic. This was so strange that I asked why he did it. click for more...

Flowmeter Accuracy Statement

A flowmeter is calibrated to its full scale of 200 flow units but is capable of up to 400 flow units. The flowmeter can measure a flow of 100 flow units within 1 unit and can measure 200 flow units within 2 units. What is the accuracy statement associated with this flowmeter? 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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