Propane Tank
How the pressure of a propane tank gauges work?
Since propane, like water boiling at a constant pressure for a temperature given, I do not understand how the gauges that you attach to the output of the propane tank could say how much remains in the tank. In other words, I expect the pressure to be independent of the amount of propane left in the tank.
You are quite right! The pressure in the tank is completely independent of the volume. The pressure varies with temperature. These gauges are completely unnecessary. Read full until they it is almost nothing in the fall of the tank, then as a rock when the tank is almost empty ...
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