... (cooling water+5°C)~65°C±0.1°C,temperature probe(US) pH detection and control 2.00-12.00±0 ... .05pH, autocontrol by adding acid and base, pH sensor (Mettler, Switzerland) and shielding lead (Mettler, Switzerland). fermenter is autocontrolled ... detection and control 0-150±3% displaying precision 0.1%, sensor (Mettler, Switzerland) and shielding lead(Mettler, Switzerland) Feed control fermenter ...