Jinx
Member
- May 15, 2019
- 13
Yes, I own the Harbor Freight regulator. It's compatible with N2 --fits into the valve just fine-- but as has been shown in another thread on this site (can't remember where), the conversion factor between Ar and N2 is different for each manufacturer's gauge, so in practice any "conversion" becomes a SWAG: Scientific Wild-Assed Guess. I think it would have been fine had I not flubbed it due to SI. If/when I try again, I intend to kick the flow up to around an indicated 18 LPM and cross my fingers.
The hose barbs can come in different sizes, and you'll need to wait and see what the one is on the regulator you order, but the one on the Harbor Freight model is 1/4" (I just measured) and I just used 1/4" ID vinyl tubing from Home Depot or the hardware store (can't remember which).
I might go with the Harbor Freight one then. Thanks for measuring! It's cheap enough that I can experiment with fitting some tubing. If my setup fails, I'll possibly still have enough money left to attempt a different method. Did you need to use a hose clamp or anything to secure it or did it fit tightly enough on its own?
I really wish it was simple enough where you could buy a single package that included everything you needed. But I guess that would raise all kinds of legal issues, sigh. Max Dog has a U.S. kit for $330 which is pretty outrageous considering they're merely slapping their sticker on a modified $55 oxygen regulator. For that price it should come with a tank of nitrogen too. Not to mention there currently seems to be a 10 WEEK waiting list! I don't think I can stand to wait for months. I'm already really upset that I'm going to miss my originally planned deathday. The only real upside with their kit is added reassurance that the parts should fit as they're meant to.
I also remember reading a similar comment where someone was discussing flow rates comparing different gases but I can't remember who or what thread it was either unfortunately. It's a bit disconcerting if it varies by gauge. Although if Max Dog is actually using an O2 regulator maybe the difference in conversion is negligible? Your SWAG approach gave me a good laugh though