every time we head out camping i always wonder if we have enough propane. there is a small gauge where the hoses from the two 30 pound tanks meet the regulator between the tanks, but it doesn't show the amount accurately.
So the other day my wife and i were shopping at Costco and saw propane tank fuel level gauges. I purchased two ($12 each) and came home and installed them on the tanks.(the hoses were a little tight but i managed to make it work) The needle on the gauge's showed one tank empty and the other one at 2/3 full.
it'll be nice this season not having to remember when we topped up last and no keeping track how much we use!!
the gauges have night glow so you can see the amount at night.(or maybe at 2am when the furnace isnt working and you realize you forgot to check your checks