How it works
Care222™ consists of a special bandpass filter, a 222 nm excimer lamp and an inverter. The filter removes harmful wavelengths that are included in the ultraviolet light emitted by the 222 nm excimer lamp. The 222-nm ultraviolet irradiation device (SafeZone UVC®) uses a krypton chloride (KrCl) excimer lamp (maximum output wavelength: 222 nm) and a special filter to cut off dangerous wavelengths of 230 nm or longer. Light emitted from the device can penetrate and kill bacteria.
Meanwhile, at the cellular level, the light does not penetrate into human cell nuclei, at the tissue level; light is absorbed by the stratum corneum of the skin and does not penetrate into epidermal cells. The SafeZone UVC device has been shown to dramatically reduce biological damage of human cells when compared to conventional ultraviolet lamps, while keeping the advantages of disinfection.
Time to inactivation depends on the distance from the light source to the air and surfaces below it.
A characteristic of UVC is that it is absorbed by the DNA and RNA of bacteria and viruses. Absorption of ultraviolet by the DNA or RNA in a cell or virus causes its destruction through the formation of cyclobutane pyrimidine dimers that make it impossible for the bacteria or virus to replicate. They then die. This is the mechanism by which ultraviolet kills bacteria and renders viruses inert.
Accordingly, there are in principle no bacteria or viruses which cannot be killed or inactivated by UVC. Nor is there any concern that germs may mutate and become resistant to UVC in the way they often become resistant to drugs.