... Turbidity Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/ ... , free for clean and durable;² High brightness LED lights, with long service life;² Extremely large storage ... °CPower supply22OV, 50Hz Electrical Lab Equipment (Automatic Refractometer;1.3000-1.7000nD; External USB and RS232;LED lights;)