... , Automatic Refractometer, Abbe Refractometer, PH/DDS/TDS Meter, Incubator, shaker, Hotplate, Mixer, PCR, Oven, etc.The ... preheat technology is the heating elements evenly distributed around the tank, the pre-heating of the cavity inner ... PID intelligent automatic control systemDegree of vacuum displayPointer display Digital displayVacuum degree control Manual controlElectronic automatic controlTemp. ...