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Wireless gas leakage detection systems are necessary in the oil and gas industry (OGI). This is because they are more flexible in terms of installation and maintenance. However, wireless gas sensors have an average life span of 2 years. This is because of the huge energy consumption of the gas sensors. In this paper, a wireless gas sensor network (WGSN) combining adaptive sleep cycle and energy harvesting is developed. The system is able to reach a life span of 5.5 years with the help of solar panels.