Inside and Out Coffee Refractometer Measurements

Coffee Data Science

Better know a refractometer

Using a refractometer to measure total dissolved solids (TDS) in coffee is based off of some data correlating TDS and a refractive index. I’m not sure what this data was based off of, but I saw some weirdness in the TDS measurement compared to groundtruth for espresso.

This discrepancy got me thinking, what about the inside and the outside of the bean? Could the dissolved solids from each part of the bean …

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