OPSIS System 300 is approved for the parameters: SO2, NO2, and O3 Certificate No. CCAEPI-EP-2020-070
OPSIS System 400 is approved for the parameters: SO2, NOx and O2 Certificate No. CCAEPI-EP-2017-109
U.S. EPA TÜV, Germany MCERTS, UK GOST Standard, Russia National Approvals Swedish EPA Bureau Veritas DNV-GL RINA Lloyd's Register