The BESANTEK Corporation BSTMG01NH3 Ammonia Gas Detector may be used in underground coal mining, the petrochemical industry, environmental protection and other spaces where explosive gases may exist. The BST-MG01NH3 is specifically designed to detect Ammonia gas, and produces a sound and light alarm when the NH3 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.