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October 2011
Ultrasonic Level Measurement (Part 1 of 3)
Spitzer and Boyes, LLC
Ultrasonic level measurement sensors emit ultrasonic energy towards the material and measure the remnants of the energy that is reflected from the material surface. One sensor emits ultrasonic energy while a second sensor receives the remnants. Some designs package both sensors in the same physical device so it may appear to be a single sensor. click for more...
The Cards You’re Dealt:
When a Backwards Flowmeter Is The Best Option
Flow Control (October 2010)
Last month, the installation of the catalyst recirculation flow element was discussed as it related to the operation of the reactor. In particular, the reactor was operated for approximately six months using flow measurements based upon a Venturi flow element installed backwards. (During a shutdown, it was "confirmed" that the Venturi was not touched). Part of the reason the meter was operated in this way for such an extended period of time was, in part, because the plant was waiting for another shutdown to correct the installation. click for more...
QUIZ: Tap Orientation for DP Flow Element in Gas Service
Flow Control (October 2010)
A differential-pressure primary flow element to measure gas flow is installed in a horizontal pipe. How should its taps be oriented?
A. On the top of the pipe
B. 45-degrees above the centerline of the pipe
C. On the side of the pipe on the centerline
D. On the bottom of the pipe
click for more...
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