The Wattstopper DT-200-U is a dual technology corner-mount ceiling occupancy sensor suited for open offices, classrooms, and commercial spaces requiring precise, low-false-trigger occupancy detection. Combining passive infrared and ultrasonic technologies, it delivers 2,000 sq ft of coverage at 24VDC, 33mA while meeting BAA/TAA compliance requirements for government and federally funded projects. The 40 kHz ultrasonic frequency provides reliable minor-motion detection in challenging environments.