This is such an illuminating post.
"I haven't been able to find anything on [removed due to sourcing] Nitrogen regulators aside from the posts I've mentioned above, which are mostly yours.
So if you and anyone else could share any further information on their experience using / testing this product and opinions on the quality etc, that would be incredibly helpful to myself and other members researching which regulator to purchase."
Reasonable question - cornered --- and as expected -- deflection / evasion / disingenuous - and zero substantive response.
I think I would go with MDB - but definitely not [removed due to sourcing] -- given the lack of history - lack of data -- and the general impression that some of the "supporting" posts may not be what they seem.
Or else --- just use a standard Argon welding flowmeter/regulator -- which has a 1/4in flared connector output.
But to solve the output hose problem - both in size ( too big) and in how to connect it - butchering on a cable clamp doesn't work
-- instead use this flared connector adapter to 1/4 inch barb -- and then a standard Oxygen tube - that can easily be taped to the exit bag.
Amazon product ASIN B0722ZDXYL
Amazon product ASIN B07S31XTYM
Yes - the cylinder threading varies country to country -- and also for each gas type within a country.
Generally there is at least one type for Oxygen and a different one for other gases ( Ar, He, N2 etc). Sometimes the nut turns clockwise - sometime anti-clockwise.
Mixing up oxygen with other cylinders could cause an explosion -- giving non oxygen gas to people to breathe ... well that's why you're here ....
Helium is only for party balloons (aside from research grade purity $$$ helium) -- but the regulator / nozzle for inflating balloons is no use to you - need to use a different regualtor/flowmeter
Nitrogen - is for use by welders or HVAC people - they put non oxygen gas inside metal tubes while they weld the metal tubes - or fill up an AC unit and check if it leaks - but generally the regulator is just high pressure / low output pressure dials -- almost always no flowmeter. They just output a pressure.
-- have to add on a flowmeter ( tube with a metal ball/bubble in it) --- and then the output connector needs to be for a barbed tube - preferably 1/4 in - to fit medical O2 tubing
-- it is not often used by welders -- only special types -- and everyone now knows about Nitrogen for suicide - so is harder to get.
When you ask for a flowmeter they will ask why you want this - no one else does ...etc etc
---- all the gas suppliers have warnings not to sell to people who cannot explain - for suicide risk prevention etc.
Generally there are few suppliers for gases in a given area - sometimes just one - so if you go there and blow your cover -- then you're not getting any other gas ( eg argon) either ...
Argon seems to be still easily obtainable - is very common for use with $500 MIG/TIG welders as a cover gas - flowmeter/regulator is standard.
They output a flowrate - from a few l/min up to about 40l/min - conveniently...
Just have to have a 1/4in ( 6mm) barbed adapter to connect to thin medical O2 tubing to go to exit bag.
