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Principles of Operation ; Three Gascope Combustible Gas Indicator models are available. The Model 60 is designed for use by gas utility companies in routine testing for methane-in-air concentrations in manholes, sewers, curb boxes and other street openings. The Model 62S, also suitable for use by gas utility companies, is designed for reading 0-100% LEL methane-in-air and 0-100% by volume methane-in air. The Model 62 is for general industrial use and is designed for reading 0-100% LEL pentane-in-air. / Approvals & Standards; ME approved for use in Class I, Division 1, Groups C and D hazardous locations defined by the National Electric Code. / Hazards; Combustible Atmosphere / Product Information ; Portable instruments for use in detecting, measuring and pinpointing leaks of combustible gases and vapors. Each unit is easily carried with integral neck and waist straps, leaving hands free for climbing, operating the instrument or carrying additional equipment.