Tag Archive: helium

Scuba Q and A: Why Do Deep Divers Use Helium?

Filed Under: Scuba Diving Q and A by Andy Davis

February 22, 2019

Scuba Q and A: Why Do Deep Divers Use Helium? Q. Why is helium preferred over nitrogen for diluting oxygen during deep sea diving? Answer: There are three reasons why helium becomes a necessary addition to breathing gas as depth increases: Oxygen Toxicity Oxygen is known to cause central nervous system (CNS) toxicity at higher […]

Tags: co2, density, depth, helium, inert gas, limits, narcosis, nitrogen, oxygen, toxicity

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