The Protech by Hirsch SDI-77XL2-EX-MEA-OUT is the outdoor-specific Main Electronic Assembly (MEA) replacement module for the PIRAMID EX explosion-proof motion detection platform. Designed as a direct drop-in replacement, this MEA delivers the same 100 ft. x 40 ft. (30 m x 12 m) Stereo Doppler microwave detection coverage without requiring replacement of the existing explosion-proof housing or mounting hardware — significantly reducing maintenance time and cost. Purpose-built for outdoor hazardous environments, the MEA-OUT features complete conformal coating for moisture and corrosion resistance, a 4" detection window, and outdoor-specific software that compensates for heavy rain while providing enhanced immunity to birds and small animals. Certified for Class I Div. 1 & 2 (Groups C, D), Class II Div. 1 & 2 (Groups E, F, G), Class III, and NEMA 4, 7BCD, 9EFG classifications, and approved by the USAF for Protection Level 1 Nuclear & Below. Powered by a flexible 10.5 to 28 VDC input with just 1.1W consumption, this MEA is the ideal service replacement for maintaining uninterrupted perimeter detection at petroleum refineries, oil platforms, chemical plants, and other critical outdoor hazardous locations.