The Wesroc solution looks like it may work great. I have emailed for information from them as well and will call on monday.

Since these tanks are underground, will the temp be a factor? It gets cold as the home is in the mountains at about 9000' but being underground should keep the tank at a somewhat constant temp. I do not know the exact depth the top of the tank is underground though.

For my application, it would need to be something that attached to the valve or fit in the 12" access opening from above ground as digging all 10 tanks up to put a meter on the side is not cost effective at this point.

One last question, would it require a meter on each tank if they are all interconnected to one line to the house?