
The product does not accurately measure alcohol content. Before fermentation begins, the grape must is measured at 25.0 Brix (both with a refractometer and with an areometer). This implies a potential alcohol content at the end of fermentation of around 14%. The alcohol refractometer shows 21 to 22%, which is impossible. The refractometer is also not easy to read and it takes some practice to get the reading right.

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