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Appendix C：ADT681AEx EX-Proof Description
Conform below intrinsically safe certifications:
IECEx & ATEx：
Ex ia IIC T4 Ga
Ta=-20℃to+50℃
IECEx SIR 21.0018X
CSANe 21ATEx2078X
CSA：
Class I,Division 1,Groups A,B,C and D,T4
Class I,Zone 0,AEx ia IIC T4 Ga
CSA 21CA 80045682X
Ex ia IIC T4 Ga
Ta=-20℃to+50℃
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