Electronics > Projects, Designs, and Technical Stuff
COVID-19 Emergency - Using UV Lamps to sanitize Face Masks overnight
Zero999:
--- Quote from: fcb on March 20, 2020, 12:56:02 pm ---
--- Quote from: Gyro on March 20, 2020, 09:58:04 am ---You can always get a robot to do it... and the rest of the room (UV-C):
--- Quote ---Coronavirus: Robots use light beams to zap hospital viruses
--- End quote ---
https://www.bbc.co.uk/news/business-51914722
I hope they use PIR sensors as well as a warning voice!
--- End quote ---
I've seen one of these robots up-close and also under test.
Essentially they are just a bunch (Philips) UVC tubes. 99.8% of the electronics, software and smarts are about detecting when someone has walked into a room unwittingly, remote control and IoT wank.
They will ruin your eyes VERY quickly. I suspect they will also destroy alot of plastics used in the ward with more than occasional use. Also, these are used AFTER you have already cleaned a room.
--- End quote ---
It does seem expensive. It would be much cheaper to add some germicidal light fixtures (not expensive, just ordinary fluorescent tube fittings, with germicidal tubes fitted) to the room, with a PIR and interlocks to shut them off if anyone enters the room, when they're on.
fcb:
There would be some benefit in moving the unit (robotic) - this would lower shading. Probably more cost-effective to put several static units in.
Buriedcode:
--- Quote from: najrao on March 20, 2020, 12:23:15 pm ---I am an old man stuck at home with only the woman I married 50 years ago. Neither of us is infected, so far as we know. I live in Bangalore, India, which has very low incidence of the virus infection just yet.
Hand sanitizers are in short supply. But I have a large hoard of isopropyl alcohol, 99+% strength which I use to clean pcb's and assemblies. Would it work as well as ethyl?
Let me have a quick reply please, thank you.
--- End quote ---
Washing hands with running soapy water is better than using hand sanitizers - because you're removing oils that help the virus stay on the skin. Warm/hot water is preferable as this helps the soap grab the oils. But IPA will disinfect if its between 50 and 90% concentration, hence the 70% figure floating about on the web. So thats handy for surfaces, the 70% concentration also slows down evaporation, because IPA and other alcohols don't "instantly" kill viruses, it takes time.
https://www.cdc.gov/infectioncontrol/guidelines/disinfection/disinfection-methods/chemical.html
SiliconWizard:
Proper washing is better, but alcohol-based hand sanitizers are certainly better than nothing when/where you don't have instant access to anything else. Like with masks, it's again all about lowering the risks, not making them disappear entirely.
Siwastaja:
--- Quote from: najrao on March 20, 2020, 12:23:15 pm ---I am an old man stuck at home with only the woman I married 50 years ago. Neither of us is infected, so far as we know. I live in Bangalore, India, which has very low incidence of the virus infection just yet.
Hand sanitizers are in short supply. But I have a large hoard of isopropyl alcohol, 99+% strength which I use to clean pcb's and assemblies. Would it work as well as ethyl?
Let me have a quick reply please, thank you.
--- End quote ---
It works, but you don't need it if you are self-quarantining. Just wash hands normally.
Alcohol-based products are a good addition to periods between being able to wash hands if you can't avoid going to public places.
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