big scale fermenter for plant fermentation for yeast, bacteria, fungi, vaccine Capcity: 5L-20000LPressure: 0. ... and automatically control parameters of temperature, rpm, pH, DO, feed, foam and etc. It possesses functions of digital setting, quick validation ... alarm function; 4. DO sensor and signal transmission line.. 3 Foam control 1.Automatically control and automatically alarm; 2.Eletrode check ...