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Lung diffusion test mixtures

Pulmonary function

The lung diffusion test mixtures supplied by Air Liquide Healthcare are used in pulmonary function tests and to calibrate analytical instruments that measure the amount of carbon monoxide diffused through the lungs. Once a patient inhales a test mixture, their exhalation is analyzed to determine how well the lungs have diffused one of the carbon-based gases present.

Depending on the lung diffusion instrument, different mixes may be required. To respond to your diverse needs, we offer the following mixtures in several cylinder sizes:

  • 1,000 ppm carbon monoxide, 21% oxygen balanced with nitrogen
  • 0.3% carbon monoxide, 10% helium, 21% oxygen balanced with nitrogen
  • 0.3% carbon monoxide, 0.3% methane, 21% oxygen balanced with nitrogen
  • 0.5% carbon monoxide, 0.5% neon, 0.5% acetylene, 21% oxygen balanced with nitrogen balance
  • 0.5% carbon monoxide, 0.5% neon, 21% oxygen balanced with nitrogen

We are able to cater to your needs. If you require a mixture not listed above, please contact us. 

Air Liquide Healthcare’s lung diffusion test mixtures help quickly and easily identify lung function.


NOTICE: Administration of lung diffusion test mixtures may be hazardous or contraindicated. For use only by, or under supervision of, a qualified healthcare practitioner experienced in the use of lung diffusion test mixtures. 

Why choose us

  • 01


    Our history and extensive personnel resources and capabilities, as well as our state of the art NATA accredited ISO 9002 laboratory and production facilities, assure precise and reliable pure gases and gas mixtures that you can depend on

  • 02


    We supply a complete range of high-quality specialty gases, including mixtures used in specific applications to suit your requirements

  • 03


    As one of the world's largest supplier of industrial, medical and specialty gases you will find Air Liquide on every continent in the world