Fuji Electric ZFK8 Instruction Manual page 6
The direct insertion type zirconia oxygen analyzer detector
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Also See for ZFK8:
- Instruction manual (35 pages) ,
- Instruction manual (35 pages) ,
- Instruction manual (35 pages)
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1.
INTRODUCTION
1.1
General description of zirconia oxygen analyzer
This zirconia oxygen analyzer makes use of the oxygen ion conductivity of solid electrolytes composed
If electrodes of platinum or the like are attached to both faces of a solid electrolyte and the faces are on the
High-oxygen partial
pressure side P
H
Solid electrolyte
Electrode
Low-oxygen partial
pressure side P
L
Zirconia
Oxygen molecule
Flow guide tube
Flow of gas
electrically.
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) at high temperatures.
–
O
2
Ionization
O 2-
O
2-
Molecularization Electromotive
O
2
Tree-phase interface:
a part where electrochemical
reactions occur.
Platinum
Stack
(ionization)
–
(molecularization)
Nernst's equation
RT
E =
4F
force
E
: Electromotive force
P
(O
) : Oxygen partial pressure of a
H
2
reference gas (atmosphere)
P
(O
) : Oxygen partial pressure of a
L
2
measured gas
R
: Gas constant 8.3144[J･m ol
T
: Absolute temperature[K]
F
: Faraday constant 9.649×10
Detector
Converter
Cable
(sensor output line, thermocouple output line,
heater power wire)
P
(O
)
H
2
1n
P
(O
)
L
2
-1
･K
-1
]
4
[c･mol
-1
]
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