Gas leakage from liquefied petroleum gas (LPG), methane, propane, and other combustible gases poses a serious threat to human life, property, and the environment. Accidental gas leaks in homes, laboratories, and industrial plants can lead to fire hazards, explosions, and health complications if not detected at an early stage. Conventional gas detection systems primarily rely on standalone alarms that provide only local alerts without remote monitoring or automatic preventive measures. To address these limitations, this paper proposes the design and development of an IoT-based Smart Gas Leakage Detection and Safety System that ensures real-time monitoring, instant notification, and automated control actions.The proposed system employs high-sensitivity gas sensors (such as MQ-series sensors) interfaced with a microcontroller (e.g., Arduino/NodeMCU/ESP8266) to continuously monitor gas concentration levels in the surrounding environment. The sensor data are processed and transmitted to a cloud-based platform through Wi-Fi communication. When the gas concentration exceeds a predefined safety threshold, the system activates a buzzer and visual indicators for immediate local warning. Simultaneously, real-time alerts are sent to users via a mobile application or SMS notification. Additionally, an automatic gas shut-off mechanism is integrated to minimize risk by cutting off the gas supply instantly.

Dr.M.Jaithoon Bibi, K.Darshana,"IOT Based Smart Gas Leakage Detection and Safety System (GLDS)" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(4): Page(273-278) March - April 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.