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This issue sponsored by Industrial Automation INSIDER

September 2016

So Many Pumps, So Many Applications... A Critical Application

One of the most important issues for users of pumps for metering is the throughput. There are hundreds of thousands of small chemical metering pumps (usually of the diaphragm type) sold annually. These pumps are designed to meter accurate volumes of liquid each time the diaphragm strokes. But if the diaphragm pump doesn't have a full chamber, the output of the pump is not accurate at a given stroke length and stroke frequency. click for more...

Part V: What's the Best Flowmeter to Measure the Flow of Raw Materials?

Positive displacement flowmeters that measure the actual volume of the fluid passing through the flowmeter (volumetric flow), flowmeters that measure fluid velocity, flowmeters that measure mass flow, and differential pressure flowmeters that measure inferentially were discussed in previous articles. These technologies measure volumetric flow, infer volumetric flow, measure mass flow, and measure velocity head (respectfully). click for more...

Quiz Corner: How Does Temperature Affect PD Pressure Drop and Meter Sizing?

How would a decrease in temperature of a liquid with a viscosity of 1000 cP tend to affect the pressure drop and size of an existing positive displacement 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 publishes the Industrial Automation INSIDER that is an independent subscription newsletter for industrial automation and process control system users, installers and suppliers world-wide, giving a monthly update on the continuing evolution, development and convergence of automation technologies.

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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