At present, the explosion-proof certificates are classified in the following ways:

※ Media classification according to applicable environment

(1) class I explosion-proof certificate, applicable to underground mine

(2) class II explosion proof certificate, applicable to non underground explosive gas environment

(3) class III explosion-proof certificate, i.e. dust explosion-proof certificate, applicable to explosive dust environment

※ Classification by countries and districts

(1) Explosion-proof certificate: applicable to explosion-proof electrical equipment in China,

(2) ATEX certificate:applicable to explosion-proof electrical equipment and non electrical equipment in EU market

(3) IECEx certificate: applicable to explosion-proof electrical equipment and non electrical equipment of IECEx system Member States

(4) North America explosion proof certificate:applicable to explosion-proof electrical equipment in North America

(5) Explosion proof certificate of other countries

※ Classification according to explosion-proof type