... is 128*64 LCD screen Ozone gas detector for Electronics/petroleum/petrochemical/chemical NT 8313 Portable Ozone(O3)Gas ... can continually test O3.This product is applicable to environmental monitoring, industrial production ,chemical and other occasions with O3 , ... -8313 Series Portable O3 Gas Detector is widely used in Electronics ,petroleum ,petrochemical,chemical ,metallurgy \electric power and other ...