... Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/ ... active substance.Automatic Measurement:WZZ-2A built-in auto-controlling system. Power on the polarimeter, the ... Measurement Range+45°~-45°Transmittance1%Light SourceSodium Lamp plus Filter, Wavelength 589.44nmSample Tubeup to 200mmDisplay & OutputLCD ...