| Issue |
EPJ Web Conf.
Volume 367, 2026
Fifth International Conference on Robotics, Intelligent Automation and Control Technologies (RIACT 2026)
|
|
|---|---|---|
| Article Number | 03008 | |
| Number of page(s) | 9 | |
| Section | Smart and Sustainable Systems | |
| DOI | https://doi.org/10.1051/epjconf/202636703008 | |
| Published online | 29 April 2026 | |
https://doi.org/10.1051/epjconf/202636703008
IoT based Portable Manhole Gas Sensing System
1 School of Electronics Engineering, Vellore Institute of Technology, Chennai, Tamil Nadu, India
2 Centre for Healthcare Advancement, Innovation and Research, Vellore Institute of Technology, Chennai, Tamil Nadu, India
3 Department of Electronics and Communication Engineering, School of Engineering and Technology, CHRIST University, Bengaluru, Karnataka, India
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 29 April 2026
Abstract
Maintenance of sewage systems requires workers to enter confined manholes, where hazardous gases can build up. These toxic, flammable gases create a serious safety risk. To address this problem, a portable gas monitoring system based on IoT technology was designed for real time sensing and observation. The proposed system comprises of MQ- 4, MQ-6, and MQ-7 gas sensors, along with a DS18B20 temperature sensor, all interfaced to an ESP32 microcontroller. The data is then transmitted to a cloud platform built with Node.js and MongoDB, enabling real-time monitoring. Whenever the gas concentrations exceed the safety limits, alerts are triggered to enable early action. The experimental results show an accuracy of approximately ±2% compared to standard measurement instruments, with the latency less than 500 ms. Early warning of dangerous gas levels can significantly reduce risks during sewage maintenance.
© The Authors, published by EDP Sciences, 2026
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