I'm not looking to sell units, but I suppose I could, but just come up with a BOM of what's needed.
I'm going to dig out some past posts and gather them here with all the upcoming details, but I've got a couple questions.
I'm looking at Thorpe tube flow meters, similar to what you see on medical O2 units, and need to select a flow range acceptable for the masses, or geeks, here.
Say you have a half full/empty 750 you want to gas and save, as opposed to decanting into a 375.
You need to put this 1/4" hose down into it and trigger on the flow to expel the air and mostly fill with Argon.
You will be able to adjust the flow rate, but what would an acceptable maximum time duration be to do this?
Second, what price range seems doable for the masses here?
Say for an initial outlay to do ~1000 1/2 bottle fills, and to refill.
It's looking to be between $100 and $200, depending on options.
The above may be a moot question, especially for refills, as the cost to refill either a 40ft3 cylinder is only 10% more than to refill a 20ft3 cylinder. Both are under $50.
Acquisition cost for the 40 is however higher, about double.