YT-3300 Series – ATEX & IECEx Certification YT-3300 series including its sub models -YT-3350 (STS316 Enclosure), YT-3301 (Remote Type)- has been certified for ATEX and IECEx. To download certifications, Please click below. Download ytcltd2016-12-26T11:36:18+09:00August 8th, 2012|Ceremony|