I couldn't afford the regulator when I purchased it. I was told I needed a 540 regulator which is a pediatric regulator. The one you posted should work though. Plus it's very affordable.
We went in and they had pediatric low flow regulators. They said they couldn't sell me one. My husband says that if I purchase the tank on ebay for the regulator you posted, that I won't be able to get it filled with welders oxygen. Can you please guide me with this?
They told me that as long as I have a prescription for it they'd fill it. I'm going to try tomorrow and see if my Dr. can do this. I have difficulty breathing, not sure how bad it has to be in order for me to get one.
Edit: this should work then? I'm using ozone in my ears as well.