Amphibiman

An additional feature that I was skeptical at first is the auto set point switching. This is really a cool feature. The diver sets the perimeters of high and low and the unit will change automatically based on depth. If the diver doesn't want this there is a very simple override to manual.

As I look at my unit next to my Classic, Mk-15 and rEvo it seems bigger, but it is not really much larger at all. I think the "bigger" perception comes from the HUUUUGGGEEE breathing hoses. Which when you use the unit; that large feeling goes away. The actually unit not look at the hoses is really not that big. Those huge breathing hoses are used for better WOB at whatever depth.

Also, we could start a whole new thread on the argument about effeciency of radial vs. Axial scrubber designs; but the simple fact is the Sentinel Scrubber is incredibly effecient because of the air space around the stack (Just like Randy said.) I would guess it to be more effecient than most radial designs.

What I don't like about the Sentinel is the BC; but hey I make BC's for a living, so I could be a little biased. I don't believe that a trim weight belongs on an air-cell, but that is my opinion. So yes, mine already has a DO aircell installed. Regardless of the aircell; the unit trims out beautifully, and very easily.

Hope this helps,

Robin