... control meter, PID control, temperatures control precision.... vacuum drying machine HYDZK seriesUsage scope The products are applicable ... enterprises, universities and colleges, scientific research units under vacuum conditions for heating and drying experiment with.Features1, intelligent ... -200°C 2,temperature fluctuation ±1°C 3,vacuum degree 267paHYDZK-402Φ350*350500*500*6301220HYDZK-403Φ400 ...