UV222™
UV222 Linear
UV222 Downlight
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UV222 Cleanroom Downlight
UV222 Dual Downlight 60x60
UV222 Material Airlock
UV222 Ambulance
UV222 Compact
UV222 Industrial
Insights
Science
ComplianceDecades of UV light decontamination
For more than a century, ultraviolet (UV) light has been used to reduce microbial contamination by inactivating bacteria, viruses, and other pathogens. Conventional germicidal UVC systems are highly effective, but direct exposure to traditional UVC wavelengths can damage skin and eyes, which means people cannot be present in the room when the light is on.
UV222 introduces a different approach.
Using filtered 222 nm Far-UVC technology, UV222 is designed for continuous air and surface decontamination in occupied indoor environments. Emerging peer-reviewed research indicates that 222 nm Far-UVC can effectively inactivate microorganisms while operating within established exposure guidelines, opening new possibilities for continuous disinfection where people are present.
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The Importance of Optical Filtering in 222 nm excimer Technology
UV Medico’s UV222™ technology is based on krypton chloride excimer lamps engineered to emit Far-UVC light at 222 nm. However, unfiltered excimer lamps do not emit only 222 nm light.
In addition to the primary Far-UVC wavelength, unfiltered lamps also produce unwanted secondary emissions at longer UVC wavelengths, including around 235 nm and 250 nm. These side-band emissions have greater biological penetration and are associated with increased exposure concerns for skin and eyes.
UV Medico’s UV222™ technology addresses this challenge through the integration of a specialized optical safety filter engineered to precisely isolate the 222 nm Far-UVC wavelength while blocking unwanted secondary emissions before they leave the lamp.
The result is a highly controlled Far-UVC output designed for continuous air and surface decontamination in occupied indoor environments within established exposure guidelines.
Harmful to pathogens, safe to use in occupied spaces
Far-UVC at 222 nm is strongly absorbed by both DNA and proteins, whereas conventional 254 nm UV-C is absorbed predominantly by DNA. This difference in absorption is the key reason why 222 nm radiation can be used safely in occupied environments, while 254 nm is harmful to human tissue.
Proteins are highly abundant in the outermost layers of the skin and eyes. At wavelengths around 222 nm, Far-UVC interacts efficiently with peptide bonds within these proteins, resulting in rapid absorption of the radiation within extremely shallow surface layers.
As a result, Far-UVC is effectively attenuated before it can penetrate to the deeper layers where living cells reside.