jplante4 wrote:
Run the propane (stove or furnace) and spray the tank with water from a mister. The temp difference between the gas and liquid should show up as a dew line.
Alternately, you could get one of these.
I wonder if those actually work well. I hate the idea of spraying down the inside of my tank storage area with water when I want to find the level of propane. One thing I don't need is rust.
Somebody needs to buy one of those and report back on their efficacy. C'mon, somebody step up and take one for the team. :)