The Underground Methane Monitor S800 is designed for underground mine methane monitoring. The monitor provides adjustment-free, single person calibration and is available through our exclusive mining distributor, United Central Industrial Supply. Features of the Model S800 Methane Monitor include a large (approximately two-inch) digital display for constant indication of gas concentrations in % gas by volume or % LEL, fault codes and calibration cues. The Model S800 Methane Monitor provides relay connections for Warn and Alarm conditions. MSHA approved.