Foam/Level controller
The FerMac 280 Foam/Level Controller is used with a height-adjustable conductivity sensor and is switchable for either foam or level control. The addition pump can also be used on a timer basis. Foam is controlled by dosing using an integral peristaltic pump which gives a shot of anti-foam, and then allows a delay time for the foam to subside before the next shot is applied.
When switched to level control, the feed pump is active until the sensor detects the liquid level, then it stops. Should the bioreactor level subsequently drop, the pump will be re-activated accordingly. If used as a feed pump, the shot and delay timers can be set to control the output of the pump against time.