HHO.
I know that this thread is very controversial. But at least we can find some way of knowing that we are moving in the right or wrong direction.
1- How do you calculate production on surface area?
2-or calculate total production
3-How much power do you need for a specific application?

I have worked with MIG welders for a few years, and i've noticed these Ball-gasflow meters. A ball is lifted up and it shows Liters/min. They would be sensitive enough to measure the low gas pressure's worked with in these systems.