... , Turbidity Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/DDS/TDS Meter, etc ... . Power on the polarimeter, the system will search for zero point automatically. You need only put the sample tube in measuring ... (W)mm×200(H)mm & 25kg WZZ-2A Auto Polarimeter / Digital Polarimeter / Polarimeter Tester