... DDS Meter, TDS Meter, Multipara Meter. A & E Lab. Main Products: Atomic Absorption Spectrometer (AAS), Fluorescence Spectrophotometer, ... Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/DDS/TDS ... , 20 and 30.Single Point Push-Button Calibration:TDSscan series with one point calibration function. Themeter is ...