... Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, ... in laboratories of sugar industry, pharmaceutical industry, oil refining, foodstuff industry, chemical industry, universities ... magneto-optical modulatorLight SourceIncandescence lamp plus interference filter, wavelength 589.44nm.Measurement Range-45º~+45 ...