Check LP gas levels
The handy DometicGasChecker means no more wondering how full your LP tank is. This practical device tells you in a few seconds how full or empty a propane tank is. The fill-level indicator is based on ultrasonic technology - perfect for all commonly available steel and aluminum propane tanks with a diameter of 8 to 14 in/200 to 350 mm. Simply press the rubber-tipped probe: a green light means there is gas at the point where the measurement is taken; a red light means there is none.