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Innovation in Japan: McDonald's installs phone cleaning devices. Kills 99.9% of germs within 30 seconds while customers wash their hands - VIDEO (ua-stena.info)

submitted 10 months ago by Interesting_news to c/technology

49 comments fedilink hide all child comments

McDonald’s installs phone cleaning devices.

The systems operate on the basis of ultraviolet technology.

These systems, powered by ultraviolet technology, destroy up to 99.9% of germs within 30 seconds while customers wash their hands.

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[–] [email protected] 7 points 10 months ago (2 children)

How well is that actually going to work? UVC sterilization usually takes much longer than 30 seconds.

[–] thrawn 5 points 10 months ago (1 children)

WOTA claims 99.9% sterilization via UV-C. Does Japan have false advertising laws? I genuinely don’t see how it can be that fast, but like, it would be dumb to make difficult-to-believe claims if you could be sued for it.

Anyway, mostly unrelated, I used one of these there and I didn’t care if it was that effective. Wasn’t gonna be holding my phone for that span, so any sterilization is nice.

[–] LordKitsuna 3 points 10 months ago (1 children)

Just because you don't see how it can be that fast doesn't mean you should immediately jump to false advertising. Think of it like cooking chicken to a safe temperature, you can do it sous vide at a lower temperature and still get safe chicken it'll just take 8 hours or you can throw it in an incinerator at a thousand degrees and have it sterilized in a few seconds.

Sterilized is more than just the amount of time it's also the amount of exposure, an extremely strong UV light needs significantly less time than a weaker one

[–] thrawn 2 points 10 months ago

Oh lol. I said that cause I was inclined to believe it due to false advertising laws. Hence, it would be dumb to make such a grand claim and open yourself up to liability [if it weren’t true]. The anecdote after was worded as mostly unrelated because it wasn’t about the effectiveness, but the convenience of the little unit

[–] [email protected] 4 points 10 months ago

It’s dose dependent not just time dependent. LED uv-c emitters can pump a huge dose onto a surface from a short distance such as this device does.

This recent study showed viral inactivation using such shorter time frames.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8950158/