Dive Duration is limited by the CNS oxygen toxicity clock, the life of the CO2 scrubber and the gas supply.

Oxygen exposure limits are laid down by NOAA and according to their Exposure Limits dive duration at the default setpoint of 1.3 bar is limited to 3 hours (or 3 1/2 hours per day). This will vary if a different setpoint is selected.

The duration of a Sofnolime fill depends upon factors such as the individual diver’s CO2 production rate, water temperature and work rate. In the third party testing for CE certification the Inspiration’s scrubber duration was 3 hours in cold water (4º C). The tests simulated a continual breathing rate of 40 litres per minute RMV and a CO2 production rate of 1.6 lpm.