$40 both DIN and yoke models Cylinder Pressure Checkers Piranha Dive Shop |
$40 DIN Accurate Cylinder Pressure Checker
This.
I’ve had the DIN version of this gauge for 15 years and I still use it constantly. Confirming pressure when picking up the tanks, checking pressures at home, etc. It is an essential piece of gear for every diver IMO.
The shops I use have a pressure gauge attached to their Nitrox analyzer. Even so I check them again at home to confirm what pressure they’ve cooled down to. Helps me select the right tank for a given dive based upon planned depth. When I get an especially good fill I’ll save that tank for my deeper dives.