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Abstract: Liquefied Petroleum Gas is a source of energy used for cooking, heating and lightning. LPG is a colorless and odorless gas. However, a special odor has been intentionally added so that a potential leak can be detected easily. Cylinder Gas is present in both liquid and gas forms. When the device connected to the bottled gas starts to be used, the gaseous LPG at the top is depleted. The liquid LPG at the bottom evaporates to replace the depleted gas using the thermal energy it draws from its surroundings. Because LPG is a liquefied gas under pressure and has a boiling point of approximately 0 degree Celsius, it is in gaseous state at room temperature. This paper discusses different systems proposed for monitoring of LPG cylinders, using different technologies. Based on this discussion a new approach for monitoring of LPG cylinder is proposed.