Hi LyndaGerhardt, welcome to the group I see your new. You asked this in the right section. But there is no real good solution for a POC [Portable Oxygen Concentrator.] that is continuous flow, 99% of them are pulse dose.

I believe there is one, maybe two brands that make them. But it is heavy, and the battery last no longer than a small tank of oxygen. Although I do not know of anyone that has one.