I purchased a refractometer a few weeks back and am just trying to corolate it to my hydrometer. Unfortunately, I can't figure the darn thing out.
The OG on my English Bitter read just shy of 13 brix, or about 1.052, with the refractometer, which I considered to be reasonably close to my hydrometer reading of 1.050.
However, the OG reading of my Imperial Stout was way different. OG of 1.086 with the hydrometer, and about 10 brix, or 1.040 with the refractometer. This considering a target of 1.090.
When I racked the Imperial to secondary a few minutes ago, the reading was 1.018 with the hydrometer, but still 10 brix, or 1.040 with the refractometer.
Clearly the refractometer isn't reading the Imperial correctly, but why?