IoT based Portable Manhole Gas Sensing SystemRahul Harikrishnan, Yuvan Shankar, Lokesh Babu, Venkatachalam Rajarajan Balaji and Jesuwanth Sugesh Ramesh GabrielEPJ Web Conf., 367 (2026) 03008DOI: https://doi.org/10.1051/epjconf/202636703008
