this post was submitted on 29 May 2025
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Portable sensor enables community lead detection in tap water (phys.org)
submitted 3 months ago by free@rss.ponder.cat to c/phys@rss.ponder.cat
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[–] NaibofTabr 1 points 3 months ago* (last edited 3 months ago)

If lead is detected, a smartphone app linked to the device alerts the user with a color-coded reading and a concentration value that indicates the severity of contamination. A green screen indicates that the lead concentration is below the U.S. Environmental Protection Agency's (EPA) regulatory limits. A red screen indicates that the lead concentration exceeds the regulatory limits.

Making this dependent on an app is a terrible choice. The indication could be accomplished with an LED, no need for a smartphone screen.

Frankly I'm not sure why an electronic device is needed for something that can be accomplished with a test strip.