CE-Sign (89/336/EEC, 94/9/EC), ATEX II 1 G EEx ia IIC, T4, I M 1 EEx ia I, T 4, UL Class I, II, Div 1, Group A, B, C, D, E, F, G, Temp. Code T4, cUL Class I, II, Div 1, Group A, B, C, D, E, F, G, Temp. Code T4, IECEx EEx ia IIC, T4, Marine Equipment Directive 96/98/EC, Measurement Performance Certificate (acc. to ATEX) EN 45544 (CO, H2S), EN 50104 (02), EN 50271