I like it. Better than my idea of something that could measure height in a water column that the pressure suspended a marble. Like the breath measuring device the Dr made me use after by pass surgery.Really simple. A flap like assembly with a gauge to measure deflection. Amount of deflection would indicate flow.
I was thinking that it might need different weight, interchangeable flaps for more accurate readings.
Ya, thought about inline and just having it flow through 2 open ends. But the flow has to be enough to turn the impeller. And the impeller has to be loose enough that it doesn’t cause it’s own back pressure.Yes me observation looking at them on line is most had metal components that could be an issue in SW environs, but all of the ones I looked at were in-line meters