Recently received my Vinmetrica SC 300. I wanted to test some commercial wines to see how they compare. Tested a better Cab Sauv and found the TA 7.1 and PH 3.45. What surprised me was the S02 at 22 ppm. I always thought commercial wines had a much higher S02 to account for improper handling during shipping. It's the only one I tested so it's not a good indicator.