Principle Of Operation - Fuji Electric ZAF-6 Instruction Manual

2.2 Principle of operation

metal block.
thermal conductivity of sample gas changes, temperature of the platinum changes to vary its
Therefore, the Wheatstone bridge generates a voltage signal depending on kinds and concentration
of the sample gas.
Table 2-1 lists thermal conductivities of typical gas components, and Table 2-2 summarizes
gas analyzer.
Measuring
chamber
Fig.2-1 Structural View of Thermal Conductivity Gas Analyzer
INZ-TN6ZAF-E
Sample gas
DC constant
current
Fixed
resister
Reference
chamber
Reference gas
sealing
DC amplifer
Fixed
resister
3