PN 9000-133-VE, Rev U
Analyzer Operations – WDG-VCM, Close-Coupled Extractive
Flue Gas Analyzer
About the Analyzer Sample System
The WDG-VCM analyzer is ideal for natural gas-fired power boilers or for those
using gas during start-up and shut-down. With this analyzer, you can monitor
oxygen and combustibles for maximum fuel efficiency. In addition, the meth-
ane detector can be used for purge and light off cycles during start-up and
shut-down.
WDG-VCM analyzers with a combustibles detector are used for processes that
use natural gas for start-up and oil, fuel gas, or coal for primary fuel. Process
gas is drawn into the analyzer’s primary sample loop by an aspirator and
returns to process. Gas enters the split flow block that is separated by a baffle
and contacts the hot-wire catalytic combustibles and methane detector. It
then passes the Zirconium Oxide cell, where the oxygen concentration is mea-
sured, before returning to the main sample loop and then back to the process.
Detectors are very delicate and should be handled with care.
Figure 1-2.
Typical WDG-V Analyzer
configuration.
1-6 | Thermox
®
WDG-V / VC / VCM / VM
Summary of Contents for WDG-V
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