... Photometer, Whiteness Meter, Turbidity Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer ... sample.Specifications: ModelSGW-2 (NEW)DisplayTouch ScreenLight SourceLED, wavelength 589.44nm.Measurement Range-45º~+45ºMinimum ... Range18-30°CAccuracy+/-0.5°CRepeatabilitySample transmittance>1%≤0.002º (0.006ºZ)Sample ...