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2-5
Percent Oxygen Analyzer Operational Theory 2
Teledyne Analytical Instruments
Figure 2-3. Characteristic Input/Output Curve for a Micro-Fuel Cell
2.2.6 Micro-Fuel Cell “Class”
TBE manufactures Micro-Fuel Cells with a variety of characteristics to
give the best possible performance for any given sample conditions. A few
typical Micro-Fuel Cells are listed below with their typical use and electrical
specifications.
2.2.6.1 Class A-3 Cell
The class A-3 cell is for use in applications where it is exposed continu-
ously to carbon dioxide concentrations between 1 % and 100 % in the
sample gas.
Nominal output in air is 0.20 mA, and 90 % response time is 45 s.
Expected life in flue gas is 8 months.
2.2.6.2 Class A-5 Cell
The class A-5 cell is for use in applications where it is exposed intermit-
tently to carbon dioxide concentrations up to 100 % in the sample gas.