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  • Affix the indicator to any gas tank in accordance with the instructions on the packaging, ensuring that the lower section of the tank is covered. The top of the indicator is to the top of the packaging but if uncertain , simply immerse the tip of either end in some hot water to identify the "F'" for full, which goes to the top.
  • To activate the indicator and measure the amount of gas in a tank, pour about 125-150mls of very hot water down the length of the indicator.
  • The whole indicator will immediately change colour from black to yellow. After a few seconds the portion of the indicator below the surface level of the liquid gas in the tank will darken and return to black. The area or line where the two colours meet indicates the liquid gas level in the tank.
  • The whole indicator will revert to it’s original black colour after a couple of minutes.
  • If no colour change or only a faint colour change occurs after applying the water, repeat the process using boiling water.
  • It is not necessary to remove the tank from your appliance to take a reading of the gas level.
  • If measuring the gas level in an indoor situation a sponge and/or a small tray or dish can be placed at the base of the tank beneath the indicator to collect the water.
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