Propane flow sensor?

Does anyone have a solution for monitoring propane flow? I’m interested in monitoring my energy usage.

We have an underground tank, so that rules out the usual on-tank or weight sensors. It’s a sizeable tank, so even if I snuck one on there, I doubt I’d get useful real-time information. I saw on other posts that tankutility polls every 24 hours, so that’s not useful either.

Several appliances run on propane, so I can’t really monitor a switch or outlet electrical status as others have tried to do.

Thanks in advance for any suggestions or ideas!

You could use a standard gasmeter (but I don’t know if they are calibrated for propane, most likely not); or a pressure sensor.
I don’t know which resolution you need though.