... and automatically control parameters of temperature, rpm, pH, DO, feed, foam and etc. It possesses functions of digital setting, quick ... PH, acid and base gang control. Peristaltic pump automatically adjust to feed acid and base; 3.Control range 2-12pH, measure ... peristaltic pump automatically add defoamer. 4 Feed control 1.Maunally control; 2.Automatically add according to fixed max. height . 5 Temp. ...