UVC disinfection is effective at wavelengths from 200 nm to 300 nm. The UVC radiation emitted has a strong bactericidal effect. It is absorbed by the DNA, destroys its structure and inactivates living cells. Microorganisms such as viruses, bacteria, yeasts and fungi are rendered harmless within Minutes by UVC radiation.
If the irradiance is high enough, UVC disinfection is a reliable and environmentally-friendly method because chemicals need not be added. Moreover, the microorganisms cannot become resistant to UVC radiation.
Hospitals have always presented a risk of infection to susceptible individuals because air-borne bacteria and viruses can remain active long enough to spread throughout the entire building. The DR SAFEAIRE Surface Disinfection System uses germicidal UV-C light to disinfect room surfaces when the area is unoccupied.