It's often the case that either an old fermenter cannot provide a wide enough range of data or a special vessel is constructed for a particular purpose which has no instrumentation at all. The X-controller, from Infors AG, can be used for re-vamping older bench-scale fermenters or for adding measurement and control capability to a novel system. It is a full package with sensor amplifiers, analogue reagent/feed pumps and the capability to link with external instruments for eg. gas analysis or control of external equipment. The X-DDC controller interface is user-friendly and can work in conjunction with IRIS software for data archiving, analysis sophisticated event-based process control.