I have two vertical 20# propane tanks. Is there a device that will tell me when the tanks need re-filling? I really don't want to empty them just to know that they need to be re-filled.
I just use the auto change over regulator and don't worry about it. Having said that, the Truma LevelCheck is on my list of things to get when the price goes down a little more. When they get under $50 I will probably buy one.