Energy & Sustainability Science
Build your own water quality tester

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In response to our item about the commercial TDS (total dissolved solids) water testing tool, somebody sent us a link to this homemade meter, which tests for TDS, EC (electrical conductivity), PPM (parts per million).

EC/TDS/PPM Meter On Limited Budget – Link

Related:

  • Testing your own drinking water – Link
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Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.

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