The SDI-77XL2-EX Model of Stereo Doppler Explosion Proof Motion Detector was developed to protect Hazardous Locations due to the presence of flammable gasses or vapors, combustible dusts or easily ignitable fibers or flyings. The SDI-77XL2-EX electronic assembly is configured to be easily inserted into a special explosion-proof enclosure. The unit is suitable for applications in Hazardous Locations under the following classifications: Class I, Div. 1 & 2, Groups C,D;Class II, Div. 1 & 2, Groups E,F,G;Class III;NEMA 7CD, 9EFG