How often should oxygen levels be analyzed before diving?

Before every dive with a new mix is the correct approach to ensure safety and adherence to diving protocols. Analyzing the oxygen levels in a nitrox mix is essential because variations can occur in the gas mixture, even if it’s supplied from the same tank. Every new mix can have a different partial pressure of oxygen, which can significantly impact a diver’s safety and the overall dive plan, particularly in terms of avoiding oxygen toxicity and gas narcosis.

Regular analysis before each dive allows divers to confirm the mix's oxygen content and ensure it aligns with their planned depth and time, thereby promoting safe diving practices. Conducting this analysis is a fundamental step in managing the risks associated with diving and helps divers make informed decisions about their dive profiles.