WATT STOPPER UT3553 Wattstopper Line Voltage Occupancy Sensor Low Profile, Automatic On/Off 120/230/277/347 VAC,

WattStopper’s low-profile UT-355 Ultrasonic Line Voltage Ceiling Sensor automatically turns lighting on and off based on occupancy. The sensor mounts on the ceiling with a flat, unobtrusive appearance and provides 360° coverage. Advanced control logic based on RISC microcontroller provides: Advanced Signal Processing to eliminate false triggers and provide immunity to RFI and EMI; Walk-through Mode to turn lights off three minutes after the area is initially occupied, ideal for brief visits such as mail delivery. Zero-crossing for long relay life. LED indicates occupancy detection. Coverage 500-2,000 square feet. DIP switch simplifies sensor adjustments. Patented ultrasonic diffusion technology spreads coverage to a wider area. Clip mounting system makes ceiling tile installation simple. Terminal wiring system provides quick and easy installation. Sensor coverage tested to NEMA Guide Publication WD 7-2000. Qualifies for ARRA-funded public works projects.