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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

May 2018

The Fundamentals of Variable Area Flowmeters: Rotameters (Part 2)

Rotameters have received a new lease on life in the semiconductor and pharmaceuticals industries where ultra-clean and accurate flow measurement is required. Rotameters have been made from polysulfone, PFA and other high-purity materials, and used for specialty gas and chemical service in wet benches and wafer processing machines. click for more...

Steam Flowmeter Audit: A Calibration Solution

In previous articles, I mentioned being asked to audit the flowmeters used to bill a chemical plant for its steam consumption. One of the differential pressure transmitters was within its 'As Left' specification only to be consistently out of its 'As Found' specification during its next calibration approximately three months later. This was determined to be caused by rezeroing the transmitter on the day after reinstallation --- after the transmitter temperature was allowed to equilibrate with the outside ambient temperature. While one particular installation consistently exhibited this behavior, it is likely that the other installations were likewise affected, albeit not as much. click for more...

Level Measurement for Oil/Water

Which of the following technologies can be used to measure the level in a tank containing oil and water? 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.