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Could you provide a link to the statement you are referring to?
what's the meaning of dedicated or non dedicated EAN mixes. I saw that the Atomic M1 reg has 50% oxygen or 80% dedicated and non dedicated! No idea what this means
:depressed:
As I read it, they do not have an "80% non dedicated" model. They have a model they certify for use with up to EAN50 regardless of whether you've had dirty gases in there (weird), and they have a model they certify for use with up to EAN80 but only if you've never had dirty gases in it (normal).
I only know of one regulator manufacturer that makes (or did make) a scuba regulator that was intended for use with a mix over 40%. Poseidon made the Duration Extreme Oxygene regulator that is design for 100% oxygen service. It has no tight radus turns inside and very few combustable seals that would be subjected to the high oxygen gas. It is designed for use a decompression regulator so it is light on ports and is limited as a scuba regulator.
Not to highjack the thread, however, Aqualung also has a 100% oxygen reg.