The BESANTEK BSTMG08 Datalogging Heavy Duty Multi-Gas Detector with Air Pump can be applied to underground coal mining, petrochemical industry, municipal, environmental protection and other spaces where multi gas may exist. The BST-MG08 can be used for detecting Methane (CH4) or Combustible Gas (LEL), Oxygen (O2), Carbon Monoxide (Co) and Hydrogen Sulfide (H2S) gases simultaneously. This model offers audible, visible, and vibration alarms with user-adjustable high and low alarm points.