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DAVID W. SPITZER'S E-ZINE

TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS

This issue sponsored by Spitzer and Boyes, LLC

March 2013

Radar Contact Level Measurement (Part 1 of 2)

Radar contact level measurement sensors are commonly referred to as guided-wave radar (GWR) or time domain reflectometry (TDR) transmitters. Their sensor assembly typically consists of two probes that are partially covered by material in the vessel. Rising level tends to cover more of probes inserted from the top of the vessel. click for more...

Part II: The Swimming Pool Case

Last month I described a legal case involving a woman who allegedly damaged her lungs after allegedly inhaling chlorine gas at a hotel swimming pool. The cause appeared to involve a flow switch that did not reliably detect no-flow conditions. click for more...

Upstream Straight Run Piping Requirements

Straight run is one method used to effectively eliminate the effects of velocity profile distortion on the flowmeter such that it can measure accurately. Piping configurations that are more tortuous generally result in more velocity profile distortion. Reducing a larger amount of velocity profile distortion generally requires longer straight run. click for more...

 

ABOUT SPITZER AND BOYES, LLC

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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