Electronics > Projects, Designs, and Technical Stuff
COVID-19 Emergency - Using UV Lamps to sanitize Face Masks overnight
Zero999:
--- Quote from: Mechatrommer on March 18, 2020, 09:38:11 am ---knives and bottle gas can be controlled and contained, hazardous lamp cant, much like nuclear radiation. and its not like we are going to put our skin 1cm from radiation at any moment. the fact that it is sold means its not as hazardous as its said in the warning. its similar to when authority gives warning "dont go outside you'll get caught by covid" so what do we do? ask our nurse/doctor wife to go home? some people will take this literally.
--- End quote ---
What have you been smoking?
Germicidal lamps have to have safety warnings printed on them, because they are hazardous, but not as much has nuclear radiation. The UVC emission ceases, as soon as the lamp is switched off. The radiation can cause severe skin burns and eye damage, but is easily blocked by most clothing, wood, plastics and glass.
Fortunately, it's not too difficult to mitigate the hazard from a germicidal lamp. Operate it a box or cupboard, with adequate seals to prevent the radiation from escaping and fit any doors with safety interlock switches to turn the lamp off, before the door opens enough to allow the radiation to escape.
KaneTW:
I'm buying UVC lamps every year for my pond. Many HVAC systems have them. They're off-the-shelf unrestricted items.
Bud:
Interesting study on survival of the virus on different type of surface materials
https://www.nejm.org/doi/full/10.1056/NEJMc2004973
Copper 4 hrs
Cardboard 24 hrs
Stainless steel 48 hrs
Plastic 72 hrs
I wonder what is the magic with copper....
SiliconWizard:
https://en.wikipedia.org/wiki/Antimicrobial_properties_of_copper
Stray Electron:
--- Quote from: Mechatrommer on March 18, 2020, 09:22:37 am ---weld arc covers whats absorbed by the ozone very well (200 to 400 nm)... https://www.ccohs.ca/oshanswers/safety_haz/welding/eyes.html i'm one of many living souls to tell the tale... and if its real hazard devices (germicidal lamp), you wont be able to get it off the shelf anyway...
--- End quote ---
Wrong. The old EPROM erasers all used germicidal UV lamps. I've pulled the bulbs out of over a dozen of them and they're all marked as germicidal lamps, and have quartz tubes and contain visible amounts of mercury.
Previous posters are correct, these are definitely not eye-safe and the erasers all have interlocks to prevent them from being operated when the drawers are open, but you can take the tubes out and use them in a standard florescent fixture. I haven't looked in some years but the catalogs from the larger lamp companies used to all list germicidal lamps.
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