squidster
Contributor
my reg seems to breath harder when my head is back or looking up , is there a reg that breaths exactly the same in any position?
Regulator that breathes good in all directions?
- Thread starter squidster
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HybridDiver
Contributor
Apeks xtx200 is the best reg to my eyes. Other will say something eles, but then again all I had is apeks xtx200 and salvo regs.
You are submerged in a liquid. In every vertical inch of water column the pressure increases by 0.0361 psi. There is no way to change the physics involved with that. The sensing diaphragm in all regulators will change position relative to your lungs (and ears) as you change position.
When you look up the regulator diaphragm is higher than you. The only single hose regulator that is probably a bit better is a Scubapro D400 style since the diaphragm is next to your chin, but it is still affected by the water column.
All regulators are affected by the water column. The geometry change of a front mounted diaphragm, versus a side mounted (like Poseidon, etc.), next to the chin (like D400), back mounted (like a double hose), or even chest mounted (again double hose), will affect the relative vertical position of the sensing diaphragm in relation to your lungs, but they are all affected as you change possitions.
When you look up the regulator diaphragm is higher than you. The only single hose regulator that is probably a bit better is a Scubapro D400 style since the diaphragm is next to your chin, but it is still affected by the water column.
All regulators are affected by the water column. The geometry change of a front mounted diaphragm, versus a side mounted (like Poseidon, etc.), next to the chin (like D400), back mounted (like a double hose), or even chest mounted (again double hose), will affect the relative vertical position of the sensing diaphragm in relation to your lungs, but they are all affected as you change possitions.
mobeeno
Contributor
The discontinued Scubapro D series.
halocline
Contributor
Another vote for the Scubapro D400. The geometry of this reg is designed to mitigate the difference in breathing positions. From all reports that I've heard, it works pretty well and people that use that reg swear by it. You'll have to buy one used and get it rebuilt.
I just test dove the "Edge" regulator... and I was WAY impressed with it's breathability while inverted. But then it has a balanced first AND second stage. It looks good and though it was a tad noisy, I was pretty happy with it. Look for their premier at DEMA.
shark_tamer
Contributor
I dive with an Oceanic Delta 4.
I had a problem once when I was upside down ( looking into a cave, a wreck ...) and brought it to my LDS. They adjusted it , never happened since .
I had a problem once when I was upside down ( looking into a cave, a wreck ...) and brought it to my LDS. They adjusted it , never happened since .
The short answer is NO, there is not. N
The combination of the angled diaphragm and the coaxial exhaust valve/diphragm in the D400 meant that it had virtually no change in breathing traits in different attitudes and orientations.
Unfortunately Sp discontinued it in July 2003.
The X650 has an angled diaphragm but it's combination with the conventional exhaust valve actually makes it worse in terms of case geometry fault.
In general all second stages using a conventional layout will suffer from changes in inhalation effort related to the change in the relative positions in the water column between the center of the diapragm and the uooer edge of the exhaust valve.
Side exhaust second stages display litte change with changes in vertical orientation but do change a bit as they are rotated and can breathe wet when the side exhaust is on the high side.
Unfortunately Sp discontinued it in July 2003.
The X650 has an angled diaphragm but it's combination with the conventional exhaust valve actually makes it worse in terms of case geometry fault.
In general all second stages using a conventional layout will suffer from changes in inhalation effort related to the change in the relative positions in the water column between the center of the diapragm and the uooer edge of the exhaust valve.
Side exhaust second stages display litte change with changes in vertical orientation but do change a bit as they are rotated and can breathe wet when the side exhaust is on the high side.
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The problem stems from the distance between the diaphragm and your mouth. When you look up a little more effort is needed to crack the valve. One way to minimize this problem is a side breather like some of the Poseidons, the AGA and the Oceanic Omega II (an Omega III is rumored soon), but they do tend to be a little on the wet side.
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