The Protech by Hirsch SDI-76XL2 PIRAMID XL2 is a dual-technology outdoor volumetric intrusion sensor engineered for medium-security applications requiring reliable, false-alarm-free performance. Combining Protech's proprietary Stereo Doppler microwave technology with a dual-element passive infrared sensor in an "And Gate" configuration, both technologies must activate simultaneously to generate an alarm — delivering exceptional immunity to birds, small animals, moving vegetation, and environmental disturbances. The wide-angle Lens A provides a 50 ft. x 50 ft. (15m x 15m) volumetric detection pattern (H 90°, V 60°), ideal for protecting high-value assets and strategic areas such as utilities, chemical storage, oil and gas facilities, correctional yards, and equipment lots. Powered by 10 to 28 VDC with 100 mA current draw, the SDI-76XL2 features 10-position digital range and sensitivity controls, balanced temperature compensation, Stereo Doppler supervision that locks into alarm on component failure, and an all-solid-state user-selectable Form C relay output — all housed in a rugged, weatherproof IP65-rated metal enclosure with integrated weather shroud operating from -40°F to +158°F (-40°C to +70°C). Ships with the PH-6L swivel mounting bracket for 180° horizontal and 90° vertical adjustment.