Xavier, As David Shimell wrote helium is a much lighter gas than nitrogen so a reg doesn't need to work as hard with helium as with nitrogen. I have 2 TX50s and 1 TX40. There is not much difference, the TX50 has an inhalation cracking resistance dial. I have never had those regs freeze (50-60 m in 3-4 degrees). Killer regs! Only drawback is that the primary reg port uses a 1/2'' port instead of the 'standard' 3/8''... -- Undervandshilsener (Sub-Aquatic Regards), Peter Fjelsten Glanshatten 32C, 5220 Odense SØ, Denmark, +4566156816/+4520930208 ------------------------------------------------------------------ Peter Fjelstens TekDykningsWeb: http://www.cdcdyk.dk/pf ------------------------------------------------------------------ Technical Diving in Denmark: http://www.cdcdyk.dk/pf/techindk.htm -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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