The use of Photocatalytic Oxidation is a technology developed by NASA. This technology is incorporated into our stand-alone units to maximize irradiation inside the unit. Patented PCO elements create an effect within the unit that assists the UVC in irradiating 99.9% of pathogens on the first pass. Multiple PCO elements inside each unit are composed of a stainless-steel weave with anatase titanium dioxide to assist the UVC bulbs in the destruction of pathogens. PCO elements are used inside the stand-alone units as there is less dwell time compared to the in-line units. The use of this technology combined with multiple UVC bulbs ensures maximum irradiation of pathogens is achieved when inside your facility.