Find how much gas is left in LPG cylinder with this wet cloth trick

Some people lift the cylinder and estimate the gas remaining in it according to the weight while some tell it by the colour of the flame.

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How can we check the gas level in a cylinder using water? - Quora

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How to Measure the Gas Remaining in LPG Cylinders?

How can we check the gas level in a cylinder using water? - Quora

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