In underground coal mines are much more dangerous, as it incorporates the risky fumes and the hazardous gases that may be present in an influential quantity that can have physiological effects on the human body and can even be lethal. Timely Detection of these hazardous gases is a major challenge and needs to be followed for the safety of the miners present in the mine. As per CMR-2017, No person shall be appointed as a competent person unless he holds a Gas Testing Certificate. In a gassy seam of the second or third degree, no person shall be appointed to supervise or operate any electrical machinery, apparatus, or appliance other than a telephone or signalling device or an electric lamp or light unless he holds a gas-testing certificate.