The Protech by Hirsch SDI-76-MW PIRAMID MW is a single-technology indoor microwave intrusion sensor engineered for environments where the highest level of security is required. Delivering a wide-angle 50 x 50 ft.(15m x 15m) volumetric detection pattern, this microwave-only sensor utilizes Protech's proprietary Stereo Doppler technology — featuring dual receiving channels that intelligently discriminate against vibration, periodically moving objects, and other environmental disturbances to virtually eliminate false alarms. Powered by 10 to 28 VDC with advanced microprocessor-controlled digital signal processing, the SDI-76MW features independent 10-position digital range and sensitivity controls for precise field tuning. Housed in a rugged all-metal enclosure for maximum RFI/EMI shielding, it delivers a probability of detection (POD) greater than 0.95 with an expected nuisance alarm rate (NAR) of less than 1 per unit per year. Ideal for military installations, correctional facilities, nuclear power plants, data centers, and other high-security indoor environments where microwave-only detection is preferred over dual-technology sensing.