500 PSI – Low Pressure Tank vs. Hi Pressure Tank

[LStad]

No trick questions here or a test. This question came up after a dive where my buddy and I were both close to 500psi with different tanks. I came up with the same results posted here but I used the calculation of: Air remaining in cf = (current psi / (service pressure / cf at service pressure); Example: (500/(2640/93)) = 17.6. Thanks for the feedback and making mention of the variables.

 

[GDI]

What you are discussing here is really the gas matching of cylinders. There is a multitude of ways in doing this. Basically they all relate to some form of calculation involving a relationship of volume and working pressure. Since it appears you discussed this at the end of your dive, most likely from a who had more air remaining point of view? ( ah the ol' friendly discussion that is)

I would suggest learning how to apply it to the start of your dive so as to establish diving markers (depth, air and time) depth is easy but air and time are interlinked. By learning to gas match cylinders you'll have a much safer dive and will come to know your personal limitations better (and who is best on gas consumption) Here this may help: Genesis Dive Institute of Florida presents: Scuba Diving Tips