Suitable for using in IIA,IIB, Explosion hazardous gas zone1 and zone2. Combustible dust IIIA,IIIB,IIIC zone 21 and zone 22 Ex-Mark: Ex db IIB Gb,Ex tb IIIC Db. ATEx Cert. No.:TÜV 19 ATEX 8473U IECEx Cert. No.: IECEx TUR 19.0073U