When HN users recommended it
2 HN users recommended this in 2016, in 2 comments.
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.
2 HN users recommended this in 2016, in 2 comments.
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.
http://www.amazon.com/First-Alert-WT1-Drinking-Water/dp/B000...
You're thinking inside a rather small box here with the Raspberry Pi angle. Usually detecting harmful chemicals dissolved in water involves running some chemical reactions that consume their reagents, not just some reusable electronics.
There's a reason the kits are like this, instead of an electronic device: http://www.amazon.com/First-Alert-WT1-Drinking-Water/dp/B000...