Updated: Jun 2, 2020
Ultraviolet light is a form of light that is invisible to the human eyes. This is electromagnetic spectrum between X-rays and visible light. Our sun emits ultraviolet rays which is absorbed by the earth’s ozone layer. Ultraviolet rays has a unique characteristic of inactivating microorganisms, such as bacteria, viruses and protozoa. This capability has allowed ultraviolet light as an environmentally friendly, chemical-free, and highly effective way to disinfect and safeguard from microorganisms, such as bacteria, viruses and protozoa. Ultraviolet rays damages to nucleic acids of microorganisms hence prevents replication and inability to infect. Ultraviolet light is also used as a safe medical treatment.
Spectral range classification of Ultraviolet Rays:
UVA (315 nm – 400 nm)
UVB (280 nm – 315 nm)
UVC (100 nm – 280 nm)
Ultraviolet light energy and therefore potential to cause adverse health effects is inversely proportional to wavelength across the bands. The ranges of bands are convenient distinctions and not boundaries where sudden, large changes occur in detrimental health effects. Classification is therefore only a broad indication of the effectiveness for producing adverse health effects.
UVA has the lowest energy and the least potential to cause acute adverse health effects.
UVB has significantly higher energy and greater potential to cause acute adverse health effects than UV-A.
UVC has the highest energy and generally the most potential to cause acute adverse health effects.
UV Light Applications:
Water Disinfection etc.
Because of the inherent benefits and endless possibilities, UV light applications are quickly becoming the most popular choice worldwide for industries that require water, air and surface sterilization. Ultraviolet technology offers safe, simple, and cost-effective solutions.