I don't remember specifics, but if you just need a general idea of what amount of gas is left in your cylinder. There's a very small pressure gauge that screws into your hi-pressure port. It's only about 1/2" across the face. Has a needle that points to "1 2 3 4 5" representing thousands of psi. Works great for pony's/stages, etc. Cheap too! Maybe thirty bucks. I'll have to look at the brand name, however I'm sure you can get one from Trident. Safe diving. -- Robert Barkley Scuba Instructor **--**--**--**-- mailto:spuddiver@in*.co* Web: http://netnow.micron.net/~scuba -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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