Aircraft Oxygen Control System Testing


The Partial Pressure of Oxygen also defined as pressure exerted by oxygen component of air decreases in direct proportion to air pressure, while the altitude increases it become more difficult for humans to inhale oxygen which unfortunately if prolonged cause hypoxia and eventually death. To avoid hypoxia oxygen monitoring & controlling system in military aircraft maintains minimum Partial Pressure of Oxygen equivalent of sea level. Hence it is very important that reliability of such lifesaving system is uncompromised but how? Well, it’s CME! Time and again our state of art Altitude Chambers have stood on its reputation of the most preffered in defense industry for such sophisticate reliability testing. 

VibationTester-specsAircraft Oxygen Control System Testing_ Altitude Chamber_CM Envirosystems_CME


Be it Gaseous Oxygen Systems or Liquid Oxygen Systems or even On-Board Oxygen Generation Systems, our chamber is customisable to test such systems. The chamber mentioned here has ability to simulate altitude range from ambient to 10mbar (100,000ft) with varying temperature range between  -70 °C to +180 °C  and ramp rate of 5°C/min average from -55°C to +85° C with (50 Kg alloy +30 Kg steel) and ≤500W thermal load. It has cascade refrigeration system with brazed plate heat exchanger and semi-hermetically sealed reciprocating compressor  which is built on our On Demand Cooling technology which ensures significant power saving.







Exterior Surface Galvanized steel with epoxy based powder coating (RAL-7035)
Test Space
  • Polished 10mm stainless steel, grade AISI-304
    TIG welded, reinforced to withstand the pressure
  • Adjustable shelves provision with one shelf of loading capacity of max. 15kg
Chamber Door
  • Dual rotary lock
  • Hinged on the right hand side
  • Exterior galvanized steel with epoxy based powder coating (RAL-7035) and cladding panel (RAL-7037)
  • Interior polished stainless steel, grade AISI-304
  • Heaters to avoid condensation during low temperature cycles
  • Silicone based thermal breaker between the interior and exterior
  • Door open status will be indicated in the controller and is interlocked with the air circulation
  • Large LED display of actual temperature values for viewing from a long distance
Viewing window & Lighting
  • High insulated glass
  • Vacuumised 5 panes
  • Defogger heating
  • 50W halogen lighting with silicone enclosure
Entry Ports 1no. Entry port flange of Ø 125 mm with stainless steel cover on LHS and 125mm dia silicone plug
Air Flow TEFC motor with vacuum feedthrough sealing is used with an axial flow fan to maintain a smooth laminar air flow across the test space.
  • Semi-hermetically sealed reciprocating compressor
  • Cascade refrigeration system with brazed plate heat exchange
  • Based on the time and the cooling demand, in different modes such as soak and ramp up, the compressor automatically turns off for a significant power saving.
Cooling Unit Inner grooved high efficiency evaporator unit used with fins for heat exchange
Condensing Unit In-built air cooled condenser used for heat rejection with low noise, fan cooled finned condenser
  • Automatic oil return system to compressor
  • Oil sump sight glass
  • Refrigerant liquid flow sight glass
  • Compressor internal overload protection
  • Hot gas bypass system
  • Liquid bypass system
  • Return gas temperature digital monitoring system
  • High and low pressure digital monitoring system
  • Mechanical high and low pressure cut off switches
  • Overload trip and earth leakage trip for chamber









Test Space Dimension (WXDXH) (mm)


Test Space Volume (L)


Temperature Range (°C)

-70 to +180

Ramp Rate (°C/min)

5°C/min Average from -55°C to +85° C with (50 Kg alloy +30 Kg steel) and ≤500W thermal load. 

Altitude Range 

Ambient to 1 mbar (150,000 ft)







Venue: CTC Complex, Chennai, India | Date: January 10-12, 2018 | Our Booth No.: 2042
Products on Display: All environmental chambers for automotive testing