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.

Features of Portable Oxygen Analyzers from 0.1 ppm up to 100% oxygen

  • 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% O2
  • 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

GPR-1100 GPR-1000 GPR-2000 GPR-3500 MO
Measurement range 0-10, 0-100, 0-1000 ppm, 0-1%, 0-25% 0-1000 ppm, 0-1%, 0-25% 0-1%, 0-5%, 0-10%, 0-25% 0-100%
Accuracy < 2% of selected range at constant conditions
Response time T90 < 10 seconds T90 < 13 seconds
Recovery time 60 sec in air to < 10 ppm in < 1 hour on N2 purge 60 sec in air to < 100 ppm in < 15 min on N2 purge NA
Sensitivity (LDL) 0.05 ppm 5 ppm 0.005% 0.1%
Linearity < 1% of scale
Sensor model GPR-12-333
XLT-12-333 for gas mixture with > 0.5% CO2
XLT-12-100-M for gas mixture with > 0.5% CO2
XLT-11-24-RTS for gas mixture with > 0.5% CO2

Sensor life at 25ºC (77°F) and 1 atm 24 months in < 1000 ppm O2 GPR-11-32-RTS 32 months in air
XLT-11-24-RTS 24 months in air
24 months in 100% O2
Calibration interval 30 days
Inlet pressure 0.34 - 2 barg (5-30 psig) with atmospheric vent
Flow rate 0.5-1.0 l/m (1-2 SCFH)
Gas connections 1/8" NPT male quick connect 1/8" NPT quick connect 1/8" compression tube fittings 1/4" compression tube fittings
Wetted parts Stainless steel Brass connections; stainless steel optional GP version: Brass, plastic
ATEX version: Stainless steel flow housing, tubing and fittings
Stainless steel
Display Graphical LCD 7 x 3.5cm (2.75 x 1.375")
Resolution 0.01ppm 1ppm 0.001% 0.1%
Enclosure Painted aluminum NEMA 4X,
10.1 x 22.9 x 7.6cm (4 x 9 x 3")
3.64kg (8lbs)
Compensation Barometric pressure and temperature
Signal output 0-1V
LED indicators LOW BATT (72 hr. warning); CHARGE mode
Operating temperature 5°C to 45°C (41°F to 113°F) (GPR sensor),
-10° to 45°C (14°F to 113°F) (XLT sensor)
5°C to 45°C (41°F to 113°F)
Power Rechargeable battery (lead acid)
Battery life Up to 30 days on a single charge (40 hours with pump running) Up to 30 days on a single charge
Area classification ATEX: Ex II 2 G
Ex ib IIC T4 Gb
Tamb: 5°C to +45°C
General purpose only

GPR-1000, GPR-1100, GPR-2000 & GPR-3500 MO

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CALL 909-392-6900
Analytical Industries Inc.
2855 Metropolitan Place,
Pomona, CA, 91767
What we do
Analytical Industries Inc manufactures high-quality electrochemical oxygen sensors and gas analyzers for industrial process control as well as breathing air for diving and medical treatment.