... by satin finishingFeature: Fermentor is simens' PLC control system, and this system adopts simens'human-machine interface(HMI) and PID control ... control parameters of temperature, rpm, pH, DO, feed, foam and etc. It possesses functions of digital setting, quick validation ... function; 4. DO sensor and signal transmission line.. 3 Foam control 1.Automatically control and automatically alarm; 2.Eletrode ...