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 read about the Truma LevelCheck, it sounds great until I saw that it was $100. When they get that technology down around $20 I'll consider it. It the meantime I'll do the switchover and/or hot water thing and generally not be as sure as I'd like to know my levels.