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October 2005 News

Servomex Gas Analyzer Replaces Competitor Unit

Sugar Land TX…Servomex announces that Callidus Technologies, LLC, the Tulsa-based
combustion and environmental protection specialist, has purchased several systems utilizing two
Servomex 1900 oxygen analyzers and a sampling system meeting the strict U.S. Coast Guard
requirements for monitoring ships being loaded with volatile liquids at marine terminals. The Servomex
system provides accuracy, reliability and speed of response required.

When ships are loaded with liquids such as gasoline, fuel oils or naphtha, vapor is displaced from the
hold. This vapor can either be recovered or, as in this case, destroyed using an enclosed flare. The
composition of the displaced vapor is highly variable and under certain conditions can fall within the
flammability limits of the gas. Natural gas is used to enrich the vapor to ensure that the combustibles
are maintained above their U.E.L. (upper explosive limit). An oxygen analyzer is used to monitor and
control mixture to ensure that a hazardous situation does not arise. Because of the safety-critical
nature of this application, two oxygen analyzers are used in a redundant voting arrangement. If the
oxygen level is detected as being above the control point, action must be taken within 30 seconds.

Along with other types of combustion and process equipment, Callidus Technologies builds marine
terminal vapor destruction systems for U.S. and foreign-based customers and, as always, the budget
is tight, so a low-cost sampling system and oxygen analyzers are a concern. Having used Servomex
equipment before, and always with success, Callidus Technologies immediately turned to Servomex
for a replacement sampling system and oxygen analyzers.

The perception is that Servomex instruments are much more expensive but, in fact, the 1900 analyzer
models we used were very cost-competitive. I have always believed that Servomex analyzers are the
best, so we had no hesitation in calling Servomex as soon as we realized we had a problem. It was
also vital that Servomex could deliver a complete package, as our in-house capabilities do not extend
to building sampling systems. At every stage in the project we have been taken care of very well;
Servomex customer service standards are exceptionally high.

Servomex 1900 magnetodynamic (suspension type) paramagnetic analyzers with a custom-designed
and manufactured sampling system approved for use in hazardous area classification Class I Division
2 Groups C and D. Piping to the two analyzers was designed to be of equal length from the sample
take-off and the sampling system was configured so that the analyzers could be calibrated
concurrently, with only a single control point for the gas inlet for calibration and sample. Another
design feature was the coalescing/membrane filter that is installed in such a way that it is continuously
drained so that condensate does not collect.

Early tests with the Servomex system showed that the response time was in the order of five seconds,
and the two analyzers could easily read within 1 percent of the measured range.

Neil Frihart concludes: “Currently we are commissioning the vapor destruction system and I have
every confidence that the Servomex equipment will perform faultlessly- both during commissioning
and when it is in operation.”

More information about the Servomex 1900 gas analyzers and sample systems, as well as other
Servomex gas analyzers, all of which are available and fully supported worldwide, can be obtained
from Servomex Group by calling 281 295 5800, faxing 281 295 5899, or visiting the website at www.servomex.com.

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