... Turbidity Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/DDS/ ... recovery time after the opening,world famous axial fan, perfect air current design,ensure an ideal result ... stable, The wind speed can be adjusted, with fan switch function,ensure perfect sample culture environment ALLSENSTM programmable PID ...