Emerson NGA 2000 TO2 - Manual (Page 14)

Instruction Manual
760008-A
September 2001
1-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 TO2
Figure 1-1. Trace Oxygen Detector Coulometric Principle
ELECTRONICS
SECONDARY ANODE (+)
BI-STRATA™ DIFFUSION BAR-
RIER
SAMPLE IN
SAMPLE OUT
O
2
SENSING CATHODE (-)
SECONDARY CATHODE (-) O
2
SENSING ANODE (-)
O
2 O
2
e -
e -
KOH
OH -
S
S