What is Nitrox?

• Nitrox is any mix of Nitrogen and Air.

• Normoxic Nitrox is normal air. (21% Oxygen and 79% Nitrogen)

• Hyperoxic Nitrox is a mix with more than 21% Oxygen

– Hyperoxic mixes are known as Enriched Air or Enriched Air Nitrox

What is Nitrox?

• EANx X is the % of Oxygen

• Safe Air (Refers to a mix between 22% and 50%)

• SAA has four basic mixes

• EAN 28 This is 28% Oxygen

• EAN 32 This is 32% Oxygen

• EAN 36 This is 36% Oxygen

• EAN 40 This is 40% Oxygen

Elementary Nitrox

• How long has it been around ?

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Some experiments done in the 1870’s

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1910/1912 various tests done using Nitrox while riding a bike

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Lots of work done during the war (lots of progress)

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Started to be used as a sports gas in the 1970’s

Elementary Nitrox

• How do you name a mix ?

• – Oxygen content always named first

• EAN32 is 32% Oxygen and therefore 68% Nitrogen.

• EAN40 would be 40% Oxygen and 60% Nitrogen.