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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

June 2011

Laser Level Measurement (Part 2 of 2)

The laser beam travels from the sensor to the material and back. The beam can be attenuated in transit due a number of phenomena, including optical attenuation caused by nature of the vapors in the beam path, and dust/dirt in the beam path to/from the material. Note that the presence of dust/dirt in the path can be temporary, such as when filling occurs and causes a dust cloud to form in the path of the beam. click for more...

On the Right Flow Path:
Material Considerations to Ensure Smooth Straight-Run Piping

Have you ever seen the inside of a carbon steel pipe used for sodium chloride brine service? The inside pipe wall has ridges, mountains, boils and other strange shapes. How can you accurately measure flow in such a pipe? The upstream and downstream piping might be straight in your installation. However, the inside of the pipe can be far from straight/smooth. In this application, the strange shapes on the inside of the pipe can affect the velocity profile and, in turn, the flow measurement. click for more...

Calibrating a DP Transmitter

A differential-pressure transmitter is used to measure the level in a five-meter high atmospheric tank in water service. The transmitter high-pressure tap is located one meter from the bottom of the tank. The transmitter is located at the same elevation as the bottom of the tank (0 meters). The impulse tube constantly slopes downwards from the tap to the transmitter. click for more...

 

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ISSN 1538-5280
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