Oxygen Analyzers for Industrial Gases

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 the 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.

Oxygen Analyzers Features

  • 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


  • Purity of product in industrial gas manufacture
  • Trace oxygen in hydrogen generation by electrolysis
  • Monitoring oxygen generators
  • Measuring oxygen in metallurgical processesheat treatment and annealing
  • Gas measurement in poultry stunners
  • Analysis of gas in double glazing manufacture


As standard, the GPR-1600 has an integral bypass sample system. The analyzer can be temporarily exposed to ambient air to perform a span calibration (20.9% O2). Options: External bypass system, Heated sample system Measurement ranges: 0-10 ppm, up to 0-1% O2 (0- 25% for calibration only).


The GPR-2600 is an ideal instrument to monitor oxygen in applications which involve purging from ambient air to low percentage levels of oxygen with a variety of gases. Options: Heated sample system Measurement ranges: 0-1% up to 0-25% O2

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The GPR-3100 is fitted with a temperature-controlled sample handing system to provide an isothermal environment for the sample for increased accuracy. Measurement ranges: 0-100% up to 90-100% O2

Oxygen Analyzers Specifications

(0-25% calibration only) 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 Time60 sec in air to < 10 ppm in < 1 hour on N2 purge Not applicable Sensitivity (LDL)50 ppb50 ppm0.1%
  • oxygen Linearity < 0.5% of scale Sensor model GPR-12-333 GPR-11-32-4GPR-11-120-OPXLT-12-333 for gas mixture with > 0.5% CO2XLT-11-24-4 for gas mixture with > 0.5% CO2Sensor life at 25°C and 1 atm24 months in < 1000 ppm O2GPR-11-32-4 32 months; XLT-11-24-4 24 months24 months in 100% oxygen Calibration interval
  • Typically: 1-3 months Inlet pressure0.34 – 2 barg (5-30 psig) with atmospheric vent248 bar g (3600psig)Flow rate0.5 – 1.0 l/m (1-2 SCFH)Gas connections1/4″ compression tube fittings Temperature controlled sample system and sensor (GPR-3100 only)Analog output4-20 mA isolated, 0-1V, and 0-5VRange ID1-5 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
Measurement range 0-10, 0-100, 0-1000 ppm, 0-1% 0-1%, 0-5%, 0-10%, 0-25% 0-100%, plus suppressed zero ranges.
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;

Download Datasheet : Analytical Industries Oxygen Analyzers for Industrial Gases

Reference : aii1.com

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