Quote:
Originally Posted by MMAX
Hanna magnesium checker would be nice.
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You just gave me an awesome idea.
We can make a spectrometer that plugs into your smart phone which can do all of your tests (like each of Hanna's units combined into one) for about $35. No need to buy each individual checker, just need to get the reagents.
And the phone would have an app that would automatically log all of your measurements and plot them.