Monitor 500 gallon propane tank

[hazy swallow]

I have a 500 gallon in-ground tank. It has a little analog meter (about 1" across) on it that tells me how full it is (%). Any suggestions for a one that works wirelessly (and is HA compatible) The tank is located about 40 feet from the house.

[narrow plover]

Firstly... I would be very careful attaching anything electrical to a propane tank for obvious reasons...
I imagine that that the current meter is basically just a pressure sensor?
You could check its rating and then look for a pressure sensor that meets the spec and can be integrated in some way.
Perhaps you could just point a camera at the current solution then have something analyse the images and update a sensor?

[hazy swallow]

I'm hoping for something that is specifically designed for propane tanks.

[narrow plover]

There is Mopeka which has an integration and has some devices that may do what you want. looks like they are BLE so you might need to set up a BT proxy at the edge of the house closest to the rank for ideal signal.
THIS forum thread may be of interest as although older it seems to cover the same question.

[tribal anvil]

I saw a video of someone doing that in using ocr to give them a read out

[narrow plover]

Yeah, I have seen camera/ocr used for a few different meters/gauges.