UV Facemask - Indiegogo - Page 1
Forum section: electronics / general

author: Dave3
author_rank: Regular Contributor
timestamp: February 06, 2021, 08:41:47 pm
content: UV face mask on Indiegogo. 20,000 rpm vortex fan & UV light.A few milliseconds of UV exposure is insufficient, and Nature Research indicates several are minutes required to deactivate airbourne coronavirus.https://www.indiegogo.com/projects/uvmask-complete-protection-for-the-new-normal#/https://www.nature.com/articles/s41598-020-67211-2"Far-UVC light (222 nm) efficiently and safely inactivates airborne human coronaviruses"

author: PeLa
author_rank: Contributor
timestamp: February 06, 2021, 09:20:53 pm
content: They need two pulsed 4th harmonic NdYag lasers and a pretty big power supply for it to work as desired. The laser head will have to be water cooled

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: February 06, 2021, 10:32:00 pm
content: What a waste of money.Disposable surgical masks are good enough when combined with...commonsense.

author: Kean
author_rank: Unknown
timestamp: February 07, 2021, 12:09:34 am
content: This first funded on Kickstarter, and some people apparently have already received them.https://www.kickstarter.com/projects/umsystems/uvmask-inactivate-9999-of-all-pathogens-and-air-pollutants/comments

author: james_s
author_rank: Super Contributor
timestamp: February 07, 2021, 12:39:00 am
content: I wonder how much ozone those UV lights produce? I wouldn't want to be breathing that in for long. No doubt a bunch of people who don't know any better will buy these things, they won't work, but most will be none the wiser.

author: Kean
author_rank: Unknown
timestamp: February 07, 2021, 12:46:48 am
content: Quote from: james_s on February 07, 2021, 12:39:00 amI'm very skeptical of this project, but they do appear to have put a lot of effort into it.Ozone creation is mentioned in the (very lengthy) Kickstarter FAQ section.https://www.kickstarter.com/projects/umsystems/uvmask-inactivate-9999-of-all-pathogens-and-air-pollutants/faqs

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 21, 2021, 05:06:43 pm
content: Shouldn't this go to the Dodgy tech section?

author: daqq
author_rank: Super Contributor
timestamp: February 21, 2021, 05:11:18 pm
content: Quote from: JohnnyMalaria on February 06, 2021, 10:32:00 pmSadly that's a fairly uncommon ingredient.

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 21, 2021, 05:26:22 pm
content: Quote from: daqq on February 21, 2021, 05:11:18 pmSo putting a UV generator right in your face is the answer.

author: Stray Electron
author_rank: Super Contributor
timestamp: February 22, 2021, 12:44:11 am
content: Quote from: SiliconWizard on February 21, 2021, 05:26:22 pmYou bet! You can get face cancer instead of Covid!

author: james_s
author_rank: Super Contributor
timestamp: February 22, 2021, 02:28:33 am
content: I can only assume the UV light is contained to a chamber that the air passes through. I'm still skeptical of it working but hopefully they had the sense to prevent exposure.

author: BrokenYugo
author_rank: Super Contributor
timestamp: February 22, 2021, 02:34:24 am
content: You'll get the ozone no matter how the light is shielded, probably not healthy.2 CFM is probably insufficient, as I recall 4 is usually specified as minimum for a tight mask with supplied air.The thing I find funny about all this fancy mask business is if one is serious about not inhaling a single airborne disease particle (COVID or otherwise) 3M bayonet type respirators and P100 filters, or even surplus NATO thread gas masks and proper CBRN filters haven't been too hard to come by at reasonable prices for months now. Or throw together a PAPR for a few bucks more if you don't like shaving for proper seal, though IME people give you a wide enough berth that filtration efficiency isn't so critical if you're wearing a full face respirator of any sort in public.

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 22, 2021, 04:20:50 pm
content: Quote from: james_s on February 22, 2021, 02:28:33 amI dunno what kind of sense they had, but such a contraption would have to be thoroughly tested for safety before ever being sold. That part should be real fun.

author: Zero999
author_rank: Super Contributor
timestamp: February 22, 2021, 10:19:25 pm
content: Quote from: BrokenYugo on February 22, 2021, 02:34:24 amThat's not true. Only the shortest of UV wavelengths produce ozone and if if doesn't produce and very short wave UV, there won't be any ozone.

author: ogden
author_rank: Super Contributor
timestamp: February 22, 2021, 10:56:45 pm
content: I wonder - how it is possible to UV-disinfect air using energy source which is contained in the mask? Main question here: for how long any certain volume of the air is irradiated by UV light of certain power. One may claim to "disinfect" 1m^3 of air using 1mW UV LED during 1 sec and tell that 1m^3 of the air did see UV radiation, thus it is sterile[disclaimer: it was speculative exaggregation]