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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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Some level measurement systems measure the level of the material. For example, float location and the amount that a capacitance probe is covered with material are indicative of the material level.
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Internet postings are often amusing. I recently came across such a posting that said (paraphrasing to protect the innocent) that differential-pressure flow sensors need to be located a certain length downstream of pressure pipe bends and restrictions - such as control valves - to ensure the flow is more laminar and more predictable. This statement reads reasonably well to the casual observer, but tends to lose its luster under scrutiny.
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Reducing the motor speed of a constant-torque pump reduces the energy consumption of the motor. When the motor is operated at 80-percent speed, what is the approximate motor energy consumption expressed as a percent of the full-speed motor energy consumption?
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Spitzer and Boyes, LLC sells
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ISSN 1538-5280
©2011 Spitzer and Boyes, LLC
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