GE
Sensing
Applications
OxyTrak™ 411
Panametrics In Situ Flue
Gas Oxygen Analyzer
OxyTrak 411 is a Panametrics
product. Panametrics has joined
other GE high-technology sensing
businesses under a new name
_
GE Industrial, Sensing.
An in situ oxygen analyzer for
• Utility boilers; natural gas or oil fired
• Process heaters; natural gas or oil fired
Features
• Self calibrating
• Sealed internal reference sensor_no reference gas
required
• IR through-the-glass keypad for Zone 1/Division 1
areas
• Probe lengths of 19, 39 or 60 inches (0.5, 1 or 1.5 m)
• One-step, one-gas, calibration verification
• Drop-down menu user program
• RS485 or RS232 communications port
• Isolated current loop or voltage output
• Fail-safe fault alarm
• Onboard system diagnostics
g
GE
Sensing
Self Calibrating with No Reference Gas
The OxyTrak 411 uses a patented miniaturized zirconia
sensor with a sealed internal-reference chamber to
accurately determine flue gas oxygen content and
rapidly respond to process changes. This new sensor’s
unique design is self calibrating. The internal electrical
calibration of the sensor is performed automatically
without the need for calibration gases.
User-Friendly
The OxyTrak 411 is a modular design that maximizes
serviceability. A separate port is provided for access to
the sensor core.
Why Monitor Flue Gas?
Ideally, every burner should mix a precise ratio of air and
fuel, and the fuel should burn stoichiometrically to yield
only heat, water vapor and carbon dioxide. In reality, this
rarely happens. Burners age, mixing is imperfect,
colorific value of fuel varies, firing rates change, and the
weather changes from day to day. Any of these factors
can change the amount of air required for safe and
efficient combustion of fuel. Accurate flue gas analysis
minimizes fuel costs and reduces pollution in all
combustion processes.
Accurate and reliable oxygen measurement has always
been dependent upon tedious sensor calibration and
costly reference gases_until now.
Too little O
2
Increase air
supply
Typical
zone of
control
Too much O
2
Decrease air supply
Low High
Combustibles
losses
O2&
combustibles
optimum
control
point
O2only
operating
set point
Excess
air losses
Typical Combustion Control Scenario
% Excess O
2
PPM Combustibles
Combustion applications typically trim burner air supply to run
excess oxygen at an optimal level to ensure complete
combustion.
The system works by pumping oxygen out of sealed
reference chamber to establish a baseline and then
measuring the electrical charge as oxygen ions
re-equalibrate back into the chamber equal to oxygen
partial pressure in the flue gas. The electrical charge
measured is directly proportional to oxygen
concentration.
In addition, the sensor’s sealed internal-reference
chamber eliminates the need for a reference gas. If
manual calibration verification is desired, a gas port is
provided for a simple, one-gas, one-step procedure,
using air or other gases and remote or local user
interfaces.
Sensor assembly access port and probe assembly
Glass
seal
Sensor
Diffused process gas flow
ZrO
2
Inner reference chamber
Inner
electrode
Outer electrode
Sealed-reference zirconia oxygen sensor and sensor technology
Sensor assembly access
port with sensor assembly
partially removed
Sensor assembly
(not to scale)
GE
Sensing
OxyTrak 411
Specifications
Accuracy
±0.1% O2or 1% of reading whichever is greater
Repeatability
±0.05% O
2
Output Resolution
±0.01% O
2
Measurement Range
0% to 25% O
2
Ambient Temperature Effect
±0.02% oxygen/°F (°C)
Process Pressure Effect
Less than ±0.05% O2per psi pressure compensation
Process Pressure Range
450 to 1000 mm Hg
Supply Voltage Effect
Less than ±0.05% O
2
Alarm Output
• One fail-safe, Form C fault alarm
• Two Form C, general purpose,
assignable alarm outputs
• Two Form C autocal alarms
Performance
Functional
Analog Output
Linearized, isolated, 0/4 to 20 mA or 0 to 2 V output, user
selectable, field programmable for any range from 0 to
25% O2(e.g., 0 to 5% O2)
8.19 in
(208 mm)
5.06 in
(129 mm)
10.54 in
(268 mm)
L
6.12 in
(156 mm)
8.40 in
(213 mm)
4.62 in
(117 mm)
8.64 in
(219 mm)
1.56 in
(40 mm)
2.00 in
(51 mm)
5.60 in
(142 mm)
L = probe length
Digital Output
RS485 or RS232, user selectable
Output Load
600 Ω at 20 mA output
Power
100, 115, 230 or 240 VAC
Ambient Temperature Range
-4°F to 140°F (–20°C to 60°C)
Sensor Temperature
Self-heated and controlled 1382°F (750°C)
Flue Gas Temperature Range
302°F to 1202°F (150°C to 650°C)
Calibration Verification
Gas flow rate (optional) 100 ±10 cc/min
ESC ENTER
GE
Sensing
OxyTrak 411
Specifications
Physical
Sensor Type
Patented, sealed, internal-reference, zirconium oxide
sensor
Wetted Materials
316 stainless steel, ceramic
Probe Lengths
• Standard: 19 in (0.5 m)
• Optional: 39 in (1 m) or 60 in (1.5 m)
Electronics Dimensions (w x h x d)
9 in x 10 in x 9 in (229 mm x 254 mm x 229 mm)
Total Length (19 inch probe)
31 in (787 mm)
Total Weight (19 inch probe)
31 lb (14 kg)
Mounting
• Standard: 2 1/2 in MNPT
• Optional: 2, 2 1/2 in, 3 in or 4 in flange
Housing
Weatherproof: Type 4X, IP66
Hazardous Area Certifications
• Explosion-proof design: Suitable for Class I, Division 1,
Groups C&D Type 4X (approval pending)
• Flameproof design: EEx d IIC T5 (approval pending)
European Compliance
Complies with EMC Directive 89/336/EEC, 73/23/EEC LVD
(Installation Category II, Pollution Degree 2) and PED
97/23/EC for DN<25
©2004 GE. All rights reserved.
920-049C
All specifications are subject to change for product improvement without notice.
OxyTrak™ trademark of GE. GE®is a registered trademark of General Electric Co. Other
company or product names mentioned in this document may be trademarks or
registered trademarks of their respective companies, which are not affiliated with GE.
Flue gas
flow
OxyTrak 411
probe and
probe sleeve
Mating flange
(customer supplied)
OxyTrak 411
mating flange,
bolts, nuts
Nozzle
(customer supplied)
Flue wall
Typical horizontal flue gas analyzer installation
Order Information
Record selected option in blank indicated at bottom of form.
OxyTrak 411 In Situ Flue Gas Analyzer
Package
1 Weatherproof
2 Explosionproof
Power
1 100 VAC
2 115 VAC
3 230 VAC
4 240 VAC
Probe Length
1 19 in (0.5 m)
2 39 in (1 m)
3 60 in (1.5 m)
OxyTrak 411___ __ __ Use this number to order product
g
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