Your propane gas gauge is located under the dome at the top of the tank gauge for LPG. Reading your propane gas gauge is not complicated. You’ll see bold black numbers encircling the gauge and a single pointer needle. The pointer will indicate a number that represents a percentage.
Due to the physical properties of propane, your tank gauge for LPG is considered full at 80% (allowing for the expansion of propane vapor). A propane tank gauge for LPG is in IMMEDIATE NEED of refilling at 20%. For your safety and protection, it is best to fill your tank gauge for LPG before the gauge goes below 20%.
Look at the gauge attached to the tank gauge for LPG with numbers from 5 to 95. The numbers indicate the percentage of gas in the tank gauge for LPG. If your tank gauge for LPG has a gauge that ranges 0-300 that is pressure not percentage.