The household need for alternative fuels such as LPG gas at this time is fundamental. The advantages offered include easy installation and also because of the low price. However, the characteristics of LPG gas that is flammable and heavier than oxygen make LPG gas leaks difficult to detect. This condition can cause problems for LPG gas users. Proper handling needs to be done by a system that is able to detect LPG gas leaks. The system itself must go through a test of the level of sensitivity to gas concentrations. Comparison of the level of sensitivity to the concentration of ethane gas was carried out using 3 gas sensors, namely; The MQ-2, MQ-5 and MQ-6 gas sensors are connected to the Arduino Uno microcontroller which can be used as a feature to classify gas conditions by applying the Fuzzy Mamdani method. The LCD displays the system output which is marked with a bell and fan to decompose the concentration of ethane gas. Arduino Uno programmed using fuzzy logic aims to determine the rate of gas leakage and provide a solution through fan rotation and buzzer sound. The test results show that the system can detect various gas leak conditions with an accuracy of 93%. From the simulation and testing results, the MQ-6 gas sensor has a better sensitivity than the MQ-2 and MQ-5 which have the lowest sensitivity to LPG gas leakage.

Keyword: LPG Gas, Leakage, Fuzzy Logic.