This handy gas level indicator sticks to the side of a metal bottle to give a reading of how much gas is contained within.
This handy gas level indicator sticks to the side of a metal bottle to give a reading of how much gas is contained within.
Magnetic Gas Level Indicator. Sticks to the side of metal based bottles and gives an estimate of how much gas remains in the bottle. Please note, this product won't work on plastic bottles, and it most accurate while the gas is running.