... Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/DDS/TDS Meter, ... DDS-11AW Technical Dates:1.Single Point Push-Button Calibration:DDS-W series with single point calibration function, you need only set ... coefficient correctly is very important to measurement, DDS-W series can be set in the range of 0 to ...