Gas leak detection is of paramount importance for ensuring safety in various industrial, commercial, and residential settings. This paper presents a detailed investigation into the development of an LPG gas sensor system using Arduino, an open-source electronics platform. The gas sensor system utilizes an MQ-series gas sensor to detect LPG gas concentrations and triggers safety measures when the gas concentration exceeds a predefined threshold. The project's design, implementation, and performance evaluation showcase its potential for cost-effective gas leak detection applications.