Analytical Industries Inc (AII) GPR-1500 Specifications
Trace Oxygen Analyzer: sample
panel or wall-mounted
GPR-1500 series
A wall mounted oxygen analyzer in a NEMA enclosure, suitable for indoor or outdoor. This
single channel oxygen meter can be used with flow-through O2 cells for in-line gas analysis
in safe as well as hazardous areas where ATEX approval is needed. The low detection
limit of 0.05ppm offers low oxygen measurement down to a range of 0 to 10 ppm. Ideal
for clean gas applications and when used with the XLT oxygen sensor type it allows
measurement in pure carbon dioxide. The Analytical Industries long-life oxygen sensors
are maintenance-free sealed electrochemical cells that don’t need top up of electrolyte and
can be exchanged in few minutes. .
few minutes. .
PPM
Highlights
• Multiple user-configurable measurement
ranges available
• General purpose or intrinsically safe
(ATEX) models
• Fast recovery from exposure to air
• Can measure in pure CO2 with XLT sensor
• Two alarms with GPR-1500 A
Applications
• Inert gas purity measurements
• Gas quality measurements in double glazing
window manufacturing
• Blanket gas in small vessels
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Sensor Technology
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4
4
567
3030404505060
70
8
0
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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