propane tank remote gauging

[fsck]

I've not found a suitable remote propane tank level gauge. The propane tank industry seems to sell them with built-in cell phones, to call them; not very useful when you want a local readout....and there's no cellphone coverage.

I do find <

http://www.rochestergauges.com/Pages/PDFs/R3D.pdf>

& can go from there; but wonder what others before me have done.