... Turbidity Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/DDS ... active substance.Automatic Measurement:WZZ-2A built-in auto-controlling system. Power on the polarimeter, the ... tube in measuring field chamber, the polarimeter will display the angle of rotation.Auto-judge substance form levorotatory ...