When HN users recommended it
1 HN user recommended this in 2022, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2022, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
There have been several wearable sensors that measure UV exposure:
https://www.wearshade.com/articles/comparison-of-wearable-uv... https://www.amazon.com/SunSprite-Wearable-Light-Tracker/dp/B...
I have the SunSprite and the June. The June is unreliable, I believe they stopped selling them years ago. The SunSprite worked well and once I'd worn it for a full year I had a good idea of my exposure at various times of year and stopped wearing it. The magnetic clasp on it sucked though, I would often find the sensor had slipped off and stuck to my car door (or anything else made of steel). Not sure if any of the sensors listed in the article are still for sale, but you can probably still find used ones on eBay.
You can also get simple wearable wristbands or tokens or cards that change color under UV exposure:
https://smile.amazon.com/gp/product/B004XMH95K https://smile.amazon.com/gp/product/B08HV91P77 https://smile.amazon.com/Fischuel-Photochromic-Indicator%EF%...
The cards are somewhat calibrated, but any of these technologies require taking into account your personal skin sensitivity.
The technology is out there, you could probably build your own sensor using an Arduino and UVA and UVB sensors. The SunSprite is cool in that it never needs charging since it charges from the Sun.