Yep. I took gravity readings along with my experiment, and I think it was fairly linear. The wort started out at 1,35 volts @ 1,043 SG and ended at 1,05 Volts @ 1,050 SG. 300 mV on a 0,025 SG range. So for 0,001 change in SG the AD reading would change 300 / 25 = 12 mV.
You would probably...