ABB GAA330-M Operating Instructions Manual page 15

Aqua stop filter
AO2020-Uras26 gas analyzer
GAA330-M EMISSION MONITORING SYSTEM
The aqua stop filter is the final protection for the analyzer. The aqua stop
filter holds back any humidity. Since the aqua stop filter is used as a so
called 'police filter', the 1.5 m relaxation distance does not have to be con-
sidered.
The AO2020-Uras26 gas analyzer is integrated into the analyzer system for
measuring CO and SO . The main components are an infrared source (lamp),
2 2
a sample cell, a wavelength filter, and the infrared detector. The gas is
pumped into the sample cell, and the gas concentration is measured electro-
optically by its absorption of a specific wavelength in the infrared wave-
length range.
| OI/GAA330-M-EN REV. C 15