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DAVID W. SPITZER'S E-ZINE
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TECHNICAL AND MARKETING SERVICES FOR INSTRUMENTATION SUPPLIERS AND END-USERS
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Non-contact level measurement systems include laser, non-contact radar, and ultrasonic level measurement technologies. In general, these level measurement systems consist of a level sensor located above the material surface that emits a signal and processes the returns (reflections) of that signal.
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Flowmeters are often sized such that the liquid velocity at full-scale flow is approximately 2-3 meters per second. A turndown of 10-to-1 implies that a typical flowmeter will operate properly from (say) 0.25 to 2.5 meters per second.
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A primary flow element generates 0-150 inches of water column differential at maximum flow. Presuming similar design and manufacture, which of the following capsules, with the following (hypothetical) maximum spans, should be selected?
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ISSN 1538-5280 ©2011 Spitzer and Boyes, LLC
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