... and automatically control parameters of temperature, rpm, pH, DO, feed, foam and etc. It possesses functions of digital setting, ... 2.PH, acid and base gang control. Peristaltic pump automatically adjust to feed acid and base; 3.Control range 2-12pH, ... and automatically alarm; 2.Eletrode check, peristaltic pump automatically add defoamer. 4 Feed control 1.Maunally control; 2.Automatically add according ...