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OBOGS for military cargo aircraft

military cargo aircraft

On-board oxygen generating system

This autonomous system generation produces unlimited oxygen enriched air on board cargo aircraft, to meet all the physiological needs (breathable gas) of the crew, for any long or complex mission.

Unequaled performance guaranteed through a unique mechatronic design

Why should you switch to OBOGS?

  • To increase the operational reliability of the aircraft (unlimited cruising range: oxygen is no longer a limiting factor for flight range)
  • To reduce ground and logistics supports
  • To avoid fire and explosion hazards in relation to logistics and the use of liquid or high pressure gaseous oxygen
  • To improve flight safety

The pros of Air Liquide technology and design:

  • Responsive and accurate regulation of the gas
  • Wide range of operating pressure, beyond the standard values (particularly at very low inlet pressure)
  • Eased system diagnosis and management with no impact on reliability (Continuous Build-In Test)
  • Very adaptative and flexible design in order to meet any requirement for control of performances: flow, pressure, oxygen content schedules
  • Integrated monitoring device possible in option
  • Compact lightweight system.

The pros of Air Liquide expertise:

Our expertise in the fields of gases separation, analysis and storage allows to offer a global solution adaptable to your needs, integrating:

  • Definition of specifications
  • Design
  • Manufacturing
  • Integration
  • Full support

Main technical characteristics & References

  • Weight of concentrator: < 20 kg
  • Length x width x height ≈ 465 x 280 x 415 mm
  • Minimum inlet pressure: < 15 psig relative to cabin pressure for 5-12 persons
  • Electrical supply: 28 Vdc (115 Vac on request)
  • Power consumption < 3 A


  • OBOGS for A400M

Discover also:

analyser in obogs

Oxygen analyzer

As part of an OBOGS, the oxygen analyzer ensures that the system is in good working order. It analyzes the oxygen-enriched gas and sends an electrical signal reflecting the quantity of oxygen as a percentage or in partial pressure. The O2 analyzer is fitted with a zirconium oxide sensor to ensure its precision and reliability. It can operate at a wide range of pressures, from a few millibars to several bars and temperatures of up to 300°C.