Model APM – 3 Wavelength 589nm Measuring range -890 - +890 Accuracy a)+ 0.01 (-150 < optical Rotation <+ 150 b)+0.02 (optical Rotation <-150 or optical rotation>+150) Temp. Control range 15-300C, +0.50C Operation System WINDOWS Display Touch Screen Repatabilty 0.0020 (Optical Rotation) Port USB & RS 232 U disk yes Test Mode Optical rotation, Specific rotation, sugar degree and concentration Standard deviation Automatic Calculation