Measuring Refractometer Accuracy to Groundtruth for Coffee

Coffee Data Science

Better sampling to better understand TDS vs Brix vs Groundtruth

I use a refractometer (a digital Atago) on a daily basis to measure Total Dissolved Solids (TDS), which I then use to calculate Extraction Yield (EY). I assume the Atago is accurate, but there is no data provided by Atago or any refractometer producer. They only give accuracy numbers. I have done some other tests, but I wanted to see what how I could better test groundtruth. …

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