CNEX attestation:
Ex d ⅡB T4 Gb/Ex Td A21 IP67 T130℃ temperature :-20℃~+70℃ Optional-40℃~+70℃
Ex d ⅡC T4 Gb/Ex Td A21 IP67 T130℃ temperature:-20℃~+70℃ Optional-40℃~+70℃
Ex d ⅡB T6 Gb/Ex Td A21 IP67 T80℃ temperature:-20℃~+55℃ Optional-40℃~+55℃
Ex d ⅡC T6 Gb/Ex Td A21 IP67 T80℃ temperature:-20℃~+55℃ Optional -40℃~+55℃
CNEX explosion-proof :GB3836.1,GB3836.2,GB12476.1 OptionalIP68( on the basis ofGB12476.1)