Hobbies and Crafts How does occupancy sensor work? How does occupancy sensor work? Occupancy sensors that rely on ultrasonic technology send high frequency sound waves (that humans can't hear) into an area and measure reflection patterns. When the pattern changes, the sensor considers the space occupied. How do you wire an occupancy sensor? https://www.youtube.com/watch?v=fBfYWUOVfQE How do you wire a ceiling occupancy sensor? https://www.youtube.com/watch?v=9Tp1WFXJHcY Related Posts:What is the maximum Amp Ratings for 70, 80, 100, 125, 150, 200, 400, 600 Amp wire and breaker chart?What gauge of wire do you use for a 20 Amp outlet?How do I wire a 3 way switch with red and black?What is a good occupancy rate for hospital?