Plumbing manufacturers are laser-focused on hygiene, sanitation, and accessibility, developing products that play an essential role in fighting disease. Anything that eliminates or reduces the number of surfaces the user touches cuts down the potential for cross-contamination, be it bacteria, virus, bodily fluids and waste, chemicals, and more. Sensor-operated restroom fixtures that prevent the need to touch surfaces are an important component of hygienic restroom design. These sensor-based, touch-free products include faucets, flushometers, soap dispensers, and hand dryers. This course will explore these sensor technologies, including their history and cutting-edge advancements that can help projects optimize hygiene and meet sustainability goals.