1,2-Epoxyethane, Dimethylene Oxide, Oxacyclopropane, Oxiranne, Ethylene Oxide Gas Detector (ETO) 0-100% LFL 4-20mA - Catalytic sensor - SMART3G-C2-LD Sensitron Explosion Proof Enclosure with LED version Zone 1 category 2 areas S2155OE-LD