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DAVID W. SPITZER'S E-ZINE

TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS

This issue sponsored by Spitzer and Boyes, LLC

OCTOBER 2005

Which Fieldbus Is For You?

Fieldbus is a generic term applied to an open or generic network of automation devices used for factory automation or process control. However, in this article, the term "fieldbus" is limited to the specialized fieldbuses for process control. click for more...

Understand the Attraction of Magmeters

Magnetic flowmeters are among the most versatile of flowmeter technologies. These meters measure liquid velocity, from which the volumetric flow rate is inferred. The measurement is linear with liquid velocity and exhibits a relatively large turndown. In addition, the range of accurate flow measurement is relatively large and easy to change after installation. click for more...

From Process Switches to Transmitters: Improving Versatility & Cutting Cost

Process switches have been used for years in process plants for sensing flow, level, pressure, temperature, and position limits to name a few. Some switches are required by codes, such as when low and high-pressure switches are used to shut down a boiler when certain pressures are outside of safe limits. Many systems use valve limit switches to verify valve position according to the process control strategy. click for more...

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