... RH to 90%RH that you set all the time . 3. The machine won't early90s, no heating, without ... TCM, medicines, tea, spices, superior foods and dessert, and etc.30% - 40%Semiconductors, high polymer, chemical raw materials, precise instruments, ... research, special chemical medicines, precise eletronic components, perfurme, and etc. TWAIPO AP-48EX Energy saving & automatic Low Humidity ESD Dry Cabinet