UV-C radiation has a powerful germ killing effect. 85% of radiation of wavelength 253.7nm is absorbed by the nuclei of micro-organisms. As a result, the metabolic process of the cells and their reproduction stops. Viruses, bacteria, yeasts, mould, fungi and other organisms can therefore be destroyed by this means.
The irradiance and the UV dosage required to kill the micro-organism are important factors in the disinfection process.
The dosage values (D) are known for all micro-organisms. Accordingly, the required irradiance (B) and the irradiation time (T) can be calculated (D= B x T).
The germicidal portion of the UV light spectrum is responsible for the disinfection properties of Ultra Violet.