International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 13 Issue: 02 | Feb 2026
p-ISSN: 2395-0072
www.irjet.net
Smart Gas Leak Detector with Automatic Shut-off System Swayam Thakre1, Samir Chahande2, Lokesh Daheriya3, Pranay Jaiswal4, rof.Avinash.R.Mankar5, Prof.Satish Markad6 1234Dept.of ME, Guru Nanak Institute of Technology, Nagpur, Maharashtra, India
5Professor, Dept.of ME, Guru Nanak Institute of Technology, Nagpur, Maharashtra, India
6 Professor and HOD, Dept of ME, Guru Nanak Institute of Technology, Nagpur, Maharashtra, India
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Abstract - Gas leakage is one of the most common and dangerous accidents that occur in domestic, industrial, and commercial environments. Leaks of combustible gases such as LPG, methane, or propane can lead to explosions, fires, and severe health hazards if not detected and controlled in time. To address this issue, this project presents the design and development of a ‘Smart Gas Leak Detector with an Automatic Shut-Off System’ using ‘Arduino technology’. The proposed system employs an ‘MQ-2 gas sensor’ to continuously monitor gas concentration in the surrounding atmosphere. When the gas concentration exceeds a predefined safety threshold, the ‘Arduino Uno microcontroller’ immediately activates an alarm system, which includes a buzzer and LED indicators, to alert the occupants.
Key Words: Smart gas leak detector, IoT gas leakage detection,Automatic gas Shutoff,LPG gas leak sensor, Lenoid valve cutoff. 1. INTRODUCTION In modern homes, industries, and laboratories, the risk of gas leakage poses a serious threat to life and property. Gases such as LPG, methane, and propane are highly flammable and can cause explosions if not detected in time. Traditional gas leak detection systems rely heavily on manual supervision and often fail to respond promptly during emergencies. To address these challenges, this project proposes a ‘Smart Gas Leak Detector with an Automatic Shut-Off System’ using ‘Arduino’. The system integrates gas sensors, an Arduino microcontroller, a solenoid valve, and communication modules (like GSM or Wi-Fi) to ensure early detection and preventive action. When gas leakage is detected, the system not only alerts users via buzzer and message but also automatically cuts off the gas supply, thus minimizing the risk of explosion or fire. Should match with the list of references at the end of the paper.
1.1 Literature Review Early Systems-Traditional gas detectors relied on basic sensors like MQ-2 for LPG detection, paired with microcontrollers such as Arduino or PIC to trigger alarms and simple relays for shutoff valves. These addressed limitations of manual monitoring but often lacked remote access or AI analysis. IoT Integration-Recent studies emphasize ESP32 or Node MCU modules for Wi-Fi connectivity, enabling real time alerts via SMS, apps, or cloud platforms. Systems now include GPS for leak location and GSM for notifications, improving response in homes and industries. AI and Advanced Features-AI-enhanced detectors, like those using machine learning on sensor data, predict leaks and automate exhaust fans or solenoid valves. Prototypes test detection under one minute, integrating flame sensors for comprehensive safety. Gaps and Trends-Literature highlights scalability for industrial use and low false alarms, though challenges remain in low-level detection and power efficiency. Future work points to wireless networks and edge computing for broader adoption.
1.2 Methodology The methodology for a smart gas leak detector with automatic shutoff follows a structured engineering approach, combining hardware prototyping, software development, and iterative testing. It draws from established IoT-based research practices.
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