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DAVID W SPITZER'S E-ZINE (December 2021)


Magnetic Flowmeters (Part 3 of 3) by David W Spitzer

Variation in certain characteristics of magnetic flowmeters has allowed this technology to be applied to many processes. The following sections define flowmeter design categories (in alphabetical order) and how they fit the needs of their intended applications.

Uncovering the Unknowns: Valves (Part 2) by David W Spitzer

The case involving the failure of multiple manual valves described in a previous column was interesting in that you never really know what is going to happen when the case gets to trial. Although you may never see the inside of a courtroom, you never know what will happen when others in your plant or organization review your ideas in the course of your everyday work.

Differential Pressure Flow Transmitter Accuracy by David W Spitzer

A differential pressure flow transmitter measures with an accuracy of 0.05% of calibrated span. What is the flow accuracy of the differential pressure transmitter at 10% of flow rate?
     A. 0.05% of flow rate
     B. 0.50% of flow rate
     C. 1% of flow rate
     D. 5% of flow rate


In addition to over 40 years of experience as an instrument user, consultant and expert witness, David W Spitzer has written over 10 books and 500 articles about flow measurement, level measurement, instrumentation and process control. David teaches his flow measurement seminars in both English and Portuguese.


Spitzer and Boyes, LLC provides engineering, technical writing, training seminars, strategic marketing consulting and expert witness services worldwide.


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