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DAVID W. SPITZER'S E-ZINE

TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS

This issue sponsored by Endress+Hauser

MAY 2008

Ultrasonic Flowmeters (Part 1 of 4)

The flowmeters to be discussed use ultrasonic energy or correlation as their primary flow measurement technique. Therefore, a common class of "ultrasonic flowmeters" comprised of an open channel flowmeter (such as a flume or weir) that incorporates an ultrasonic level measurement is specifically excluded from this discussion. click for more...

Measuring Pressures Below Absolute Zero:
Instrument & Installation Requirements for Full Vacuum Applications

Selecting instruments for processes that operate below atmospheric pressure brings to mind a number of applications that make me think twice. Stay with me, and I’ll show you how to attempt to measure pressures below absolute zero - unsuccessfully, of course. click for more...

Defining Ultrasonic Flowmeters

English may not have been your best subject in school, but it can be the most important part of some discussions. Many engineers and technicians prefer to use equations and numbers as substitutes for words, and while this mode of communication is a superior way to describe certain phenomena and relationships, it is a poor way to describe others. click for more...

 

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