Friendly reminder after an exciting analysis today for everyone to check their gas.
I have a large quantity of AL80's for bailout, deco, stage, etc. I'm heading down to Ft. Lauderdale to dive with @LandonL @jlouder
and my mother for the weekend and just grabbed the first stage bottle out of the rack which is pretty normal when I'm diving single tanks since I don't use DIR style rigging with the handle. Bottle has a MOD120 sticker on it but no analysis sticker so I'm thinking it's full of EAN32, like one would. It feels a touch light so I hook it up to the fill station and it's got 2400psi in it so I figure I'll top it off. Hand J the analyzer as it's coming off the whip and she looks a bit bug-eyed and says "uhhh it says 77..... you check it*. I checked it, 77. This is not a normal failure mode for an O2 sensor, and it shouldn't have been that high. I knew the bank wasn't full of O2 because the other two bottles came off normal so I grab my analyzer from the truck and lo and behold, 77%. I wouldn't have knowingly put O2 in a bottle with a MOD120 sticker on there, but my bottles get borrowed by people pretty regularly and who knows when this was last dove. Stuff happens, but ALWAYS analyze your tanks because sometimes it can save your life.