Analytical Industries Inc (AII) GPR-2900, GPR-1900 Specifications
Oxygen Analyzers With Remote Sensors
GPR-1900 & GPR-2900
A panel mounted oxygen analyzer with a remote sensor allows flexibility
of installation. The GPR-1900 gas analyzer is suitable for trace oxygen
measurements as low as 0-10 ppm; the GPR-2900 measures O2 up to 100%.
The remote sensor block allows a very easy oxygen sensor replacement for
simple and fast maintenance and low cost of ownership. All versions can be
locked manually to a single range or auto-range. The user is always aware
of the oxygen measurement range used via the range ID output.
PPM
%
Highlights
• Measurement ranges from 0-10ppm up to
0-100% O
• Barometric pressure and temperature
compensation
• Accuracy of better than 2% of range
• Two user configurable alarms
• Range ID output
• 12-28 V DC or mains powered options
• XLT sensor options for CO2 backgrounds
2
Applications
• Nitrogen or oxygen generators
• Glove boxes
• Oxygen injection in fish farms
• Confined space monitoring
• Sintering and other metal processing
• Delignification and bleaching in pulp & paper
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Sensor Technology
The sensors from AII have been designed to avoid
potential weaknesses common in typical galvanic cell
design. Our materials, construction and assembly
methods have been continuously refined over
decades. Each sensor type has been specifically
engineered to provide the optimum balance between
performance and longevity for individual applications.
The result is confidence in the measurement and low
maintenance. In the absence of oxygen, the sensor
will produce zero output and the sensor is linear up
to 100%, therefore only a span calibration is required
in most cases (see graph).
Membrane
Electrolyte
0202020
0
0
2
2
-
0H
0H
i
-
0H
-
0H
-
0H
-
-
0H
-
0H
-
0H
-
0H
-
0H
Pb0 Pb0
-
0H
0H
0H
0H
0H
0H
02020
2
-
-
0H
-
0H
-
0H
-
-
0H
-
0H
-
0H
-
0H
0
2
0
2
2
-
0H
-
0H
-
0H
-
-
0H
-
0H
0H
-
0H
-
-
0H
-
-
0H
-
-
0H
-
0H
Layer
Cathode
Electrolyte
Anode
Sensor Construction
100
90
80
70
60
50
40
30
Oxygen Reading / Output
20.9%
20
15.2%
10
15.2%
0
0 10 20 30 40 50 60 70 80 90 100
60.6%
40.0%
40.3%
21.0%
100.2%
100.0%
60.3%
% Oxygen Concentration
Typical sensor output
The Analytical Industries’ XLT sensor
For applications with a background gas containing more than 0.5% CO2, the specially designed XLT sensor should be
selected. With most standard electrochemical sensors an alkaline electrolyte is used and this is neutralised over time
when exposed to acidic gases, such as CO2. To combat this, AII developed the XLT sensor with a special electrolyte
formula which has the added benefit of being able to operate in temperatures as low as -10°C.
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