What is Nitrox?
Nitrox is really any mixture of nitrogen and oxygen, but Enriched Air Nitrox for diving is a gas mix with a higher than normal oxygen content. By increasing the oxygen (O2) content, the nitrogen content is reduced. Often, you will see Nitrox referred to as the abbreviation EANx – and the ‘x’ refers to the percentage of oxygen in the mix.
Normal air has an O2 content of 21%
EAN28 has an O2 content of 28%
EAN32 has an O2 content of 32%
EAN36 has an O2 content of 36%
EAN40 has an O2 content of 40%
Now, you might think “surely, the more oxygen, the better” – but there is a catch, and it’s called “oxygen toxicity”. On the C-Divers Nitrox Course, you will discover all you need to know about oxygen toxicity and how to avoid it. Briefly though, you will learn that each mix of Nitrox has a “safe*” Maximum Operating Depth, or MOD for short. There are other factors that divers also have to be aware of – and that is why Nitrox must only be supplied to divers who are qualified to use it.