High-accuracy oxygen analyzers for monitoring gas in industrial processes where trace oxygen from low parts per million to pure O2 has to be precisely measured. Utilizing AII’s high performance galvanic oxygen sensors these advanced instruments are simple to use with a common, across-the-range chassis, HMI and menu structure, so an operator only needs to learn operation of just one instrument for multiple gas analysis applications at various oxygen levels. Available as bench-, 19" rack-, panel- and wall-mounted for flexible installation.

Features of Oxygen Analyzers for Industrial Gases

  • Easy to use HMI
  • High accuracy ( ±0.02 ppm in lowest range)
  • Four measurement ranges with manual or auto-ranging
  • 24 month sensor life with normal usage
  • Sample in CO2 backgrounds with XLT sensor
  • Bench, rack or wall mounting options
  • Two Alarms
  • Integrated bypass valve (for GPR-1600)
  • Easy access and sensor replacement
  • Easy to use HMI

GPR-1600 GPR-2600 GPR-3100
Measurement range 0-10, 0-100, 0-1000 ppm, 0-1%
(0-25% calibration only)
0-1%, 0-5%, 0-10%, 0-25% 0-100%, plus suppressed zero ranges.
50, 80, or 90-100%
Accuracy < ±2% of range
±0.1% at constant conditions after calibration with 95-100% oxygen (GPR-3100)
Response time T90 < 10 seconds T90 < 13 seconds
Recovery Time 60 sec in air to < 10 ppm in < 1 hour on N2 purge Not applicable
Sensitivity (LDL) 50 ppb 50 ppm 0.1% oxygen
Linearity < 0.5% of scale
Sensor model GPR-12-333
XLT-12-333 for gas mixture with > 0.5% CO2
XLT-11-24-4 for gas mixture with > 0.5% CO2
Sensor life at 25°C and 1 atm 24 months in < 1000 ppm O2 GPR-11-32-4 32 months; XLT-11-24-4 24 months 24 months in 100% oxygen
Calibration interval Typically: 1-3 months
Inlet pressure 0.34 - 2 barg (5-30 psig) with atmospheric vent 248 bar g (3600psig)
Flow rate 0.5 - 1.0 l/m (1-2 SCFH)
Gas connections 1/4" compression tube fittings
Display Graphical LCD 12.7 x 7cm (5 x 2.75"); resolution 0.01
Enclosure Painted aluminum
See individual mounting options for dimensions
Compensation Barometric pressure and temperature;
Temperature controlled sample system and sensor (GPR-3100 only)
Analog output 4-20 mA isolated, 0-1V, and 0-5V
Range ID 1-5 V or 4-20mA, optional relay contacts
Communications Choose from RS485, RS232 or USB
Alarms Two user-adjustable alarm relays
Operating temperature GPR sensor: 5°C to 45°C (41°F to 113°F)
XLT sensor: -10°C to 45°C (14°F to 113°F)
Power Universal 100-240 V AC

GPR-1600, GPR-2600, GPR-3100

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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.