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Research Paper | Computer Science and Engineering | Volume 15 Issue 4, April 2026 | Pages: 996 - 1001 | India
IoT-Enabled Gas Leakage Detection and Auto Shut-Off System
Abstract: Gas leakage is one of the most critical safety hazards in residential, commercial, and industrial environments. Liquefied Petroleum Gas (LPG), widely used for cooking and heating, is highly flammable and can lead to severe fire accidents and explosions if leakage occurs. Despite the presence of odorants in LPG for manual detection, relying solely on human senses is unreliable, especially during sleep hours, absence of occupants, or in poorly ventilated areas. This paper presents an IoT-enabled gas leakage detection and automatic shut-off system with call alert, designed to provide intelligent, real-time monitoring and enhanced safety. The system continuously monitors gas concentration levels in parts per million (PPM) using an MQ series gas sensor. The sensor data is processed by an ESP8266 microcontroller, which compares the values with predefined safety thresholds. Upon detection of gas leakage, the system performs multiple automated safety actions simultaneously. A buzzer is activated for immediate local alert, a relay module cuts off electrical power supply to prevent spark hazards, and a solenoid valve shuts off the gas supply to stop further leakage. Additionally, a GSM module sends SMS notifications and initiates call alerts to registered users, ensuring remote notification even without internet connectivity. The system also incorporates IoT functionality by transmitting real-time sensor data to the ThingSpeak cloud platform, enabling continuous monitoring, data visualization, and analysis. A mobile application developed using MIT App Inventor allows users to remotely monitor gas levels, receive alerts, and control system devices. The proposed system is cost-effective, scalable, and suitable for both residential and small industrial applications. By integrating early detection, automatic control, real-time monitoring, and multi-level alert mechanisms, the system significantly enhances safety and reduces the risk of fire and explosion hazards.
Keywords: IoT, Gas Leakage Detection, ESP8266, MQ-2 Sensor, Real-Time Monitoring, GSM Alerts, Solenoid Valve, Relay Module, ThingSpeak, Mobile Application
How to Cite?: Vaishnav Murali, Rinsa Rees, "IoT-Enabled Gas Leakage Detection and Auto Shut-Off System", Volume 15 Issue 4, April 2026, International Journal of Science and Research (IJSR), Pages: 996-1001, https://www.ijsr.net/getabstract.php?paperid=SR26406195053, DOI: https://dx.dx.doi.org/10.21275/SR26406195053