222nm far UVC light kill virus and human skin safety for public use
Features of the 222nm far UVC light
2. Mercur free
3. Pure 222nm
4. 100% light output in less than a second
5. Effective germicidal wavelength
6. Effective eradication of most spores
7. Wide operating temperature
8. Instantaneous on/off
9. Flexible design capabilities for custom lamp development
Parameters of 222nm far UVC light kill virus and human skin safety for public use
Input voltage(v): 24vDC
Light source: excimer light tube
UV optiical power(μw/cm2): 3500 (0cm)
Appplication area(㎡): 20
Switch mode: remote control, wifi, manual button, bluetooth
Rated power: 20w
Function: disinfection germicidal lamp, sterilization of public areas
Application of 222nm far UVC light kill virus and human skin safety for public use
The research showed that 222nm ultraviolet (UV) light has similar antimicrobial properties as typical germicidal UV light(254 nm), and without inducing mammalian skin damage. The 222nm excimer series is our new safe uv products for microbial reduction. the 222nm far UVC lights can be used for all occupied and unoccupied microbial reduction solutions. Features of the light sources of 222nm lamps allow customers to obtain 100% light output in less than a second, whereas the conventional germicidal lamp starts at only 50% output and takes several minutes to achieve 100% output.
Available in 20W to 300W, these mercury-free and instant-start excimer lamps are ideal for bathrooms, toilets, counter tops, and other home use. It also can be used to clean the hospital ICU, operating room, biopharmaceutical factory, laboratory, and all the public places such as school, bank, hotel, office, airport, railway station, movie theater and so on.
The working principle of 222nm far UVC light kill virus and human skin safety for public use
The 222nm excimer lamps contain a chamber filled with noble gas that doesn't use inner electrodes and is completely mercury-free. High voltage applied across the outside of the glass excites the gas inside, causing far-UVC 222nm light to be emitted. And the construction of 222nm lamps allow them to instantly turn on or off without warm-up time or decreased lifetime.
Our 222nm lamps with a proprietary safety filter, the short pass filter can prevent wavelengths of UV light (200nm and lower, 230nm and higher) that can penetrate human eyes and skin from being emitted, an especially important feature that other 222nm and far UVC emitting products do not have.
Can 222nm far UVC lights kill the virus, especially the coronavirus? (222nm far UVC light kill virus and human skin safety for public use)
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes coronavirus disease 2019 (COVID-19), has emerged as a serious threat to human health worldwide. Efficient disinfection of surfaces contaminated with SARS-CoV-2 may help prevent its spread.
The scientists investigated the titer of SARS-CoV-2 after UV irradiation (0.1 mW/cm2) at 222 nm for 10-300 seconds using the 50% tissue culture infectious dose. In addition, using quantitative reverse transcription polymerase chain reaction to quantify SARS-CoV-2 RNA under the same conditions.
The results showed that 1mJ/cm2 and 3mJ/cm2 of 222nm far UVC irradiation (0.1 mW/cm2 for 10 and 30 seconds) resulted in 88.5 and 99.7% reduction of viable SARS-CoV-2 based on the TCID50 assay, respectively. This study showed the efficacy of 222nm UVC irradiation against SARS-CoV-2 contamination in an in vitro experiment.
What bactericidal dose for 222nm lamps it needs to kill the virus? (222nm far UVC light kill virus and human skin safety for public use)
A direct approach to limit airborne viral transmissions is to inactivate them within a short time of their production. Germicidal ultraviolet light, typically at 254 nm, is effective in this context but, used directly, can be a health hazard to skin and eyes. By contrast, far-UVC light (207–222 nm) efficiently kills pathogens potentially without harm to exposed human tissues.
The research previously demonstrated that 222-nm far-UVC light efficiently kills airborne influenza virus and the scientists extend those studies to explore far-UVC efficacy against airborne human coronaviruses alpha HCoV-229E and beta HCoV-OC43.
The results showed that low doses of 1.7 and 1.2 mJ/cm2 inactivated 99.9% of aerosolized coronavirus 229E and OC43, respectively. As all human coronaviruses have similar genomic sizes, far-UVC light would be expected to show similar inactivation efficiency against other human coronaviruses including SARS-CoV-2.
Based on the beta-HCoV-OC43 results, continuous far-UVC exposure in occupied public locations at a low exposure intensity of 3 mJ/cm2/hour would result in 90% viral inactivation in 8 minutes, 95% in 11 minutes, 99% in 16 minutes and 99.9% inactivation in 25 minutes. So a low-dose-rate far-UVC exposure can potentially safely provide a major reduction in the ambient level of airborne coronaviruses in occupied public locations.
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