I think the big advantage of the co2 scubber duration on the Sentinel over the Inspo is that there is a far greater air space between the scrubber cartrigate and the water outside the scrubber. This means its better insulated compaired to the inspo and hence the co2 scrubbing is more efficient. There is a bit less material in the sentinels scrubber when compared to the inspo, but still has the edge at depth on paper anyway....
The difference in the scrubbing duration in the shallows isn't anything different. Both have a design life of 3 hrs or so at 40 m. I know lads have done much more on both units, but its hard to put a number on how far it can be pushed as its all down to the divers work load / water temp and with no decent in-loop CO2 monitoring, you cant really tell when you are starting to get break through..
