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Does UV Sanitizer Really Work?

May. 31, 2021

The efficacy of a good face mask has been well-proven to help prevent the spread of the Covid, but as cases continue to persist across the country, people are looking for other methods to help contain the virus. From shoe covers to HEPA air purifiers, the rise of protective gear and equipment has been well-documented. The latest item that people are stocking up on: UV sanitizers.


How do UV sanitizers work?

Ultraviolet technology was discovered in the 1870s by a doctor named Niels Ryber Finsen. In fact, he won the Nobel Prize in 1903 for using light radiation to treat diseases such as lupus. Since his discovery, hospitals have been using this technology to sterilize operating rooms and reduce the spread of drug-resistant bacteria.


So what is UV light and how does it work? UV is a form of electromagnetic radiation that produces three main types of ultraviolet light.





UVC rays have the shortest wavelength and highest energy. This allows them to break the molecular bonds that hold together the DNA of viruses and bacteria.

UVC Water Purification and Disinfection Machine

UVC Water Purification and Disinfection Machine


UVA vs UVB vs UVC Rays

A final note: it’s important to discern the difference between the different types of UV rays. The effectiveness of UVA vs. UVB vs. UVC rays will vary when it comes to fighting the coronavirus.


According to the FDA, UVA or UVB rays (the kind of ultraviolet rays you get from the sun, for example), aren’t as effective as UVC rays. As you’re probably well-aware, UVA and UVB rays are also more harmful to humans, since prolonged exposure can lead to skin damage, aging and risks of cancer (it’s the reason why dermatologists always recommend wearing a good sunscreen).


When it comes to inactivating viruses, UV sanitizers using UVC rays are the best choice for now. If you want to know about the wholesale UVC water purification and disinfection machine, welcome to contact us.


Can UVC sanitizers prevent coronaviruses?

The big question is whether these light sanitizers will kill COVID-19. So far, there is no definitive answer, but research suggests it is likely.


According to the FDA, UVC radiation has been shown to destroy the external protein coating of the SARS coronavirus. Although it is different from the current COVID-19 virus, this leads researchers to believe that UVC radiation may also effectively inactivate the current virus we are currently struggling with.

One thing we do know is that UV disinfectants are effective at killing simple viruses like influenza. a study published in 2018 showed that UVC light was effective at killing airborne H1N1, a common strain of influenza virus.


"UVC light has a very limited exposure and cannot penetrate the outer dead cell layer of human skin or the tear layer of the eye, so it is not a health hazard to humans," said David Brenner, director of Columbia University's Center for Radiology Research. "Because viruses and bacteria are much smaller than human cells, UVC light can reach their DNA and kill them."


It is also important to note that the surface you are treating with UV sanitizer is important. Smooth surfaces (such as marble and glass) are easier to disinfect than wood or fabric. This is what makes them most useful on devices such as electronic equipment.




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