The BESANTEK Corporation BSTMG01CO2 Carbon Dioxide Gas Detector may be used in underground coal mining, the petrochemical industry, environmental protection and other spaces where explosive gases may exist. The BST-MG01CO2 is specifically designed to detect Carbon Dioxide gas, and produces a sound and light alarm when the CO2 gas concentration in the environment is higher or lower than that of preset alarm point. This device is portable and can be also used as a fixed device.