... , Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/DDS/TDS Meter ... 11AW Technical Dates:1.Single Point Push-Button Calibration:DDS-W series with single point calibration function, you need only ... . Accuracy---±1oCTemp. Coefficient0~3.9% per oCCalibration Points1 point per rangeCell ConstantK=0.1, 1, 10 (Adjustable) ...