UV-C disinfection guide
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- Опубліковано 9 чер 2020
- UV-C is the part of the electromagnetic spectrum with wavelengths between 100nm and 280nm. It has been suggested as a method for disinfecting smaller objects in optical practice due to its germicidal properties.
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Clear message, clear structure, easy to understand, thank you
Very informative! Thank you!
it was informative, thank you sir
awesome video. informative
very informative
Thanks a lot
Excellent vid and thank you.
may I use your video to share and educate ?
Does the light turn the room purple, white or blue?
Thank you for your video. What is your source for the 6,020 J/m² and 10,000 J/m² criteria that you used to construct you exposure matrices? Is based on SARS-CoV-2 or some other virus?
The primary source for that table was -Arguelles, P., Estimating UV-C Sterilization Dosage for COVID-19 Pandemic Mitigation Efforts- which uses SARS-CoV-1 data. The authour states, "To motivate this comparison, the genome sequences of both coronavirus strains were analyzed and found to have effectively identical theoretical UV-C susceptibility, differing by only 1.48%.".
@@OptometryToday_AOP your table can't be right. A small room 5meters across is disinfected in 30 Min. At a distance of 5cm the lamp will disinfected in 10 to 20 seconds...not minutes
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You did not talk about the dangers such as skin burn, eye damage etc…
UV-C also yellows plastics and damages wood and other objects.
These dangers and side effects need to be mentioned.
Además de que es cancerígeno.
Far-UVC (say, above 200 but below 230nm - best studies is the USHIO 222nm excimer emitter) has been fairly widely tested and does not cause erythema, does not harm the eyes, etc. This is well documented by Dr. David Brenner and his team at Columbia University, plus others at Kobe University, Shimane University, and Dr. Ewan Eadie at Ninewells Hospital in Dundee. It was covered in detail only a few weeks ago at the 2020 Virtual Meeting of the ASP - American Society of Photobiology, and I believe the full recording of the meeting is freely available at photobiology.org.
@@yishmaryah Yeah, Far-UVC is better.
i have problem with hydrogen sulfur in my home probebly from chiken poo can a uvc help me?
Thanks for this information.....💐 please tell me from where I get more details about uvc.
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@@ilamichaelson8269 Thanks 💐
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I wonder why UVC isn't more common for simple sterilizing stuff at home and at work, it's simple, cheap and effective.
Because it's hugely dangerous. It can cause permanent damage to your eyes and skin.
@@chrishutton1458 isn't that the case for many other things like Isopropanol or ethanol that is used for sterilizing? As long as the light is inside a closed box or room I can't see much dangers besides someone mistakingly using the lamp for decorative lighting but that could only happen with non-closed systems/lights.
@@Killuminati23 Yes, I totally agree with you.
I think the concern is, that people are so unfamiliar with UVC, someone might use the lamps in a public space thinking they are the same as black-light lamps, used in discos.
@@Killuminati23 Isopropanol or ethanol are often used in non-closed systems. The caution has to be in people using UVC to sanitise whole rooms.
Which is what I want to do.
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Is it possible to have ultraviolet rays irradiated inside a box with fans pumping air into and out of the box?
Contaminated air is pumped into the box, sterilized by the UV rays, then pumped out of the box to the room where the box is located.
The advantage are:
1. people can safely be in the same room with the box without the risk of being exposed to harmful ultraviolet light.
2. you can use the air-conditioner normally without worrying about temperature or circulation of air.
3. you can safely be in the room without the risk of getting infected by COVID-19 or other airborne viruses.
The air inside the room is constantly sterilized by the box.
The box should be small, preferably portable.
Such a box does not sterilize surfaces, only the air inside a room. Surfaces should be sterilized normally with desinfectant and cloth.
Right now there is no way to safely sterilize the air inside a room. You have to open the windows to ensure good circulation of air. But during the winter and summer you need to close the windows and use the air-conditioner to have an ameniable temperature inside the room.
Most air-conditioners simply recirculate the existing air inside the room, instead of pumping clean air from outdoors.
If someone in the room is infected and shedding viruses into the air, the air gets more and more contaminated.
But a UV box that sterilizes the air while allowing the presence of people and the use of air-conditioner could be the solution.
Keep in mind that UVC produces ozone which kills bacteria but also is poisonous and the method you described may become dengerous. It is required to open windows and let the fresh air in after sterilizing the room with UV. Also sterilizing surfaces may not always be effective using cloth
Common practice. The ozone warning given only applies to some UVC emitters- others work fine. Several domestic air cleaners do this.
@@Tensquaremetreworkshop I have UVC light which says "no ozone produced", but it also says "open windows after using", and the air smells after using it.
@@reginaldpoofta5 Sounds like they are lying to you…
@@Tensquaremetreworkshop prolly yeah, its pretty powerful tho ~ 60 watts.
Published papers appear to agree that Log 3 requires ~2mJ/cm2, which converts to 20J/m2. Your figure is a massive 300 times that! Something wrong here...
PARVASENS! Is the answer!