MSA ALTAIR 4 X Multigas Detector,LEL,CO,H2S,O2, Approvals amp; Standards Europe:ATEX II 2 G EEx ia d IIC T4, Tamb= -20 to 50 C UL,Class I,Div.1,Groups A,B,C,D, Class II, Div.1 Groups F amp; G. T4, Tamb= -20 to 50 C CSA, Class I, Div. 1, Groups A B, C, D (pending) Australian amp; New Zealand: IEC Ex ia d I/IIC T4, ANZEx ia s I/IIC T4 (Zone 0) (pending) Applications Oil, gas, and petrochemical Confined spaces Fire service Utilities and telecommunications Municipal works and waste water Civil engineering Product Information MSAs new ALTAIR 4 Multigas Detector for LEL, CO, H2S, and O2 raises the standard for personal multigas detectors by offering a combination of features you wont find in competitive models.