pressure gauges are pretty useless as the pressure in the tank can vary more from ambient temperature than the actual volume of liquid remaining in the tank (IE you can have an 80% tank with ZERO pressure below -40. the pressure is directly related to the ability of the propane to boil and vaporize. If the temperature is COLD and their is not a large demand of propane, the tank is able to sustain a decent amount of pressure even if their isnt much liquid left to boil off
I much prefer to pick up the tank and see whats left in there!
'14 XLR 395AMP
'16 Ram 3500 DRW, 6.7 cummins w/aisin trans and 4.10 gears