A portable gas detector is a safety device that detects and monitors the concentration of gases in the air. A portable gas detector uses a control system, incorporating a sensor that detects the presence of toxic and/or combustible/flammable gases in its immediate vicinity. Thus, detectors are increasingly used for a wide range of applications (gas level monitoring, portable gas detection, etc.) in multiple end-use verticals, including industry, oil & gas, mining, and building automation, to provide adequate safety for working personnel. Portable gas detectors are battery-operated devices that are used to detect gas leaks and transmit warnings using audio and visual signals even when the recipient is on the move. The demand for portable gas detectors is rising for mining activities. In mining, which occurs in a confined space, portable gas detectors are increasingly preferred over their wearable counterparts, because they can be carried around for portable gas detection. In confined spaces, access is often infrequent and the danger may be greater from oxygen deficiency than from the presence of combustible gases, requiring continuous fixed monitoring.