Smc 4501-05 Gas Detector 0-100PpmSmcSierra Monitor CorporationLimathermModel No: 4501-05Class 1Div. 1Group: B,C & DFull Scale: 0-100Ppm H2SFactory Settings: 100 Ppm H2STemp. Range: -20C To +50CH2S Hydrogen Sulfide34-600Instrument HousingType: Xd-i80WinCl.I Gr. A,B,C,D;Cl. Ii.Gr. E,F,G;Cl. Iii.;Type: 4XCl. I, Zone 1, Aex D Iic, Ip66Iecex Fmg 06.0003U, Ex D Ii C, Ip68Ii 2Gd Ex D Td A21 Iic, Ftzu04 Atex 0265 UAmbient Temp.: -40C To +85C (-40F To 185F)Made In UsaWeight: 1.590 Kg