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DAVID W. SPITZER'S E-ZINE
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TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS
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Density of liquids and slurries is one of the important parameters to measure, and doing it accurately is a difficult problem. Density is defined as the mass per unit volume of a liquid, and is usually expressed in "mass-over-volume" units like g/cc. For measurement purposes, we often want to know relative density rather than density itself.
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In the first two parts of this series, I described a sewage system with an upper district (my client) and a lower district. The flowmeter accuracy was questioned because the flow from the upper district was relatively high (per capita) as compared to the lower district.
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The impulse tubing in liquid service should be installed so as to be maintained full of liquid at all times. Sloping upward will allow gas to accumulate in the impulse tubing.
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ABOUT SPITZER AND BOYES, LLC
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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.
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ISSN 1538-5280
©2014 Spitzer and Boyes, LLC
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