A cheap meter can now translate the most esoteric coffee aromas into pretty colored dot patterns that anyone can recognize. The device also works like a radiation dose badge that can warn workers when they have been exposed to toxic gases, according to Sciencepunk.

The colorimeter consists simply of a card with tiny polymer film squares that hold 36 designer dye drops, and came out of the lab of Kenneth Suslick, a chemist at the University of Illinois in Urbana-Champaign. Each dye pigment changes color when exposed to certain chemicals, and the combination of the 36 exposes a unique chemical fingerprint for certain aromas.



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