Suunto EON Steel - Features - Oxygen calculations
Find a dealer/service center

Suunto EON Steel User Guide - 1.6

Oxygen calculations

Oxygen calculations

During a dive, Suunto EON Steel calculates partial pressure of oxygen (pO2), central nervous system toxicity (CNS%) and pulmonary oxygen toxicity, tracked by OTU (oxygen toxicity units). The oxygen calculations are based on currently accepted exposure time limit tables and principles.

By default in Air/Nitrox dive mode, CNS% and OTU values are not displayed until they reach 80% of their recommended limits. When either value reaches 80%, EON Steel notifies you and the value stays in the view. In default Trimix mode, CNS% and OTU values are displayed in the bottom-right corner field as scrollable info.


You can customize views to always show CNS% and OTU.