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Portable Oxygen Analyzers from
0.1 ppm up to 100% oxygen
GPR-1000, GPR-1100, GPR-2000 & GPR-3500
Suitable for trace oxygen measurements from 0.1 ppm through to purity
applications at 100% oxygen, these rugged portable instruments share the
same advanced sensor technology as the online process oxygen analyzers
ensuring confidence in their reliability and accuracy.
The Analytical Instruments’ concept of using the same HMI and menu
structures for portable and online analyzers makes it extremely easy for
operators to use both types of instruments on their site without need for
extra training.
%
PPM
Highlights
• Rugged- made to last in field operation
• Easy to use
• Up to 30 days battery life (40 hours with pump)
• Measurement ranges from 0-10 ppm up to
0-100% O
• 24 to 32 months sensor life span (in normal use).
• Lightweight – 2.5Kgs
• Internal pump option
• 0-1V output
• XLT sensor options for CO2 backgrounds
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Applications
Spot checking for:
• Oxygen and nitrogen generators
• Storage holds on marine vessels post
maintenance
• Oxygen in tankers during delivery
• Metal treatment processes
• Leak checking processes
• Double glazing manufacture
• Welding (under N2 or Ar purge)
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Sensor Technology
3
3
4
4
4
5
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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Options available across
the range:
• Internal sample pump option
• Coalescing filters
• Sampling accessories
• Carry case for easy storage and transport
• General purpose and hazardous area versions (ATEX)
GPR-3500 MO
The GPR-3500 instrument has been developed for
measuring 0-100% oxygen in general purpose areas.
This portable oxygen analyzer features barometric
pressure and temperature compensation and is supplied
with stainless steel wetted parts, a flowmeter and
needle valve. The LDL is 0.5% O2 (the LDL can be
further enhanced with a zero calibration). This unit also
displays the ambient temperature and pressure.
For oxygen purity measurements a span gas with the
desired target concentration should be used.
GPR-1100 (ATEX)
The GPR-1100 model is an industry standard portable
analyzer for trace oxygen measurements down to 0.1
ppm. Supplied with stainless steel wetted materials,
the instrument is also equipped with quick connect
fittings to trap the sample in the analyzer and extend
the oxygen sensor service life by avoiding air diffusing
into the sensor.
Options: XLT sensor for CO2 backgrounds
Ranges Available: 0-10, 0-100, 0-1,000ppm & 0-1% (0-
25% for calibration only)
GPR-1000 (ATEX)
Optimised for measuring oxygen below 1,000ppm with
an LDL of 5ppm and is temperature compensated. The
GPR-1000 oxygen meter can also be operated up to 1%
range. It is supplied with brass fittings.
Range Available: 0-100% O
For the full selection of all portable and premium
portable oxygen analyzer models offered by Analytical
Industries Inc. please see our portables and hand-held
data sheets available on www.aii1.com as well as the
related instrument section at the end of this document.
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Options: XLT sensor for CO2 backgrounds, stainless
steel fittings, weld purge kit.
Ranges Available: 0-1,000ppm & 0-1% (0-25% for
calibration only)
GPR-2000 (ATEX)
The GPR-2000 portable instrument is designed for
percentage level oxygen measurements with an LDL
of 0.005% (50ppm) O2. This versatile oxygen analyzer
will be suitable for many applications. It is supplied with
barometric pressure and temperature compensation as
well as stainless steel fittings and internal pipework.
Options: XLT sensor for CO2 backgrounds
Ranges Available: 0-1%, 0-5%, 0-10% & 0-25%
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Technical Specifications
GPR-1100 GPR-1000 GPR-2000 GPR-3500 MO
Measurement range
Accuracy < 2% of selected range at constant conditions
Response time T90 < 10 seconds T90 < 13 seconds
Recovery time
Sensitivity (LDL) 0.05 ppm 5 ppm 0.005% 0.1%
Linearity < 1% of scale
Sensor model
Sensor life at 25ºC
(77°F) and 1 atm
Calibration interval 30 days
Inlet pressure 0.34–2 barg (5-30 psig) with atmospheric vent
Flow rate 0.5-1.0 Nl/m (1-2 SCFH)
Gas connections
Wetted parts Stainless steel
Display Graphical LCD 7 x 3.5cm (2.75 x 1.375”)
Resolution 0.01 ppm 1 ppm 0.001 % 0.1 %
Enclosure
Compensation Barometric pressure and temperature
Signal output 0-1V
LED indicators LOW BATT (72 hr. warning); CHARGE mode
Operating
temperature
Power Rechargeable battery (lead acid)
Battery life Up to 30 days on a single charge (40 hours with pump running)
Area classification
0-10, 0-100, 0-1000 ppm,
0-1%, 0-25%
60 sec in air to < 10 ppm
in < 1 hour on N
GPR-12-333 GPR-12-100-M GPR-11-32-RTS GPR-11-120-RTS
XLT-12-333 for gas
mixture with > 0.5% CO
24 months in < 1000
ppm O
1/8" NPT male quick
connect
purge
2
2
5°C to 45°C (41°F to 113°F) (GPR sensor),
-10° to 45°C (14°F to 113°F) (XLT sensor)
0-1000 ppm, 0-1%,
0-25%
60 sec in air to < 100
ppm in < 15 min on N
purge
XLT-12-100-M for gas
mixture with > 0.5% CO
2
GPR-11-32-RTS 32 months in air
XLT-11-24-RTS 24 months in air
1/8" quick connect
WP 1/8” compression
fittings
Brass connections;
stainless steel optional
Painted aluminum NEMA 4X,
10.1 x 22.9 x 7.6cm (4 x 9 x 3”)
ATEX: Ex ib IIB T4
+5°C to +45°C
T
amb
0-1%, 0-5%, 0-10%,
2
XLT-11-24-RTS for gas
mixture with > 0.5% CO
2
1/8" compression tube
GP version: stainless steel
fittings; plastic tubing
ATEX version: Stainless
steel flow housing, tubing
and fittings
3.64Kg (8lbs)
0-25%
fittings
0-100%
NA
2
24 months in 100% O
1/4" compression tube
fittings
Stainless steel
5ºC to 45ºC (41°F to
113°F)
Up to 30 days on a single
charge
General purpose only
Related instruments: Premium portables
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AII’s premium portable analyzers are built to last in demanding field conditions. With rugged
enclosures, stainless steel wetted parts, integrated flow meters and needle valves, they offer purity
measurements for inert gases, carbon-dioxide and oxygen.
Handheld devices
Compact and convenient handheld analyzers to measure oxygen concentrations for welding, diving
and personnel safety applications.
Analytical Industries Inc. 2855 Metropolitan Place, Pomona, CA 91767 USA
Tel: 909-392-6900, Fax: 909-392-3665, www.aii1.com, e-mail: info@aii1.com
Please note: Analytical Industries Inc. adopts a continuous development program which sometimes necessitates specification changes
without notice. Please contact us for the latest version. Issue No: Portable Oxygen Analyzers_partnumber_V3_UK_0219
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