The MX3 is a microprocessor controlled, aseptic whole broth sampler which eliminates the need for manual sampling and enhances the representativeness and sterility of the sampling process. The key to its operation lies both in the use of a recirculation loop and in the patented rotary valve system, which does away with the need for conventional solenoid or pneumatically actuated valves. During the course of a fermentation run, whenever a sample of fermenter broth is required, it must be transferred from the aseptic fermentation vessel to an external container. The conditions under which this operation is carried out must be stringently controlled. It is vital that there is no contamination of the fermentation broth from the external environment. Furthermore where the broth itself must not contact the external environment further conditions are imposed. The MX3 uses double seals on all moving parts, an outer containment seal, and fully sealed sample bottles. Ifused correctly with a suitable fermenter it forms a closed, self-contained sampling system. Once extracted, the sample must remain representative of the state of the sample at the moment of sampling. Under ideal conditions analysis of the sample would be carried out immediately. However, since it often involves painstaking calibration of equipment or separation this is not always possible. It is therefore often necessary to store samples for periods of time prior to analysis. The MX3 achieves sample storage by using a built-in solid state (peltier effect) refrigeration system to chill samples immediately after they are taken. Further growth or change of the samples is quickly stopped and the samples remain representative of the broth at the moment of extraction until analysis can be performed.

This unit also comes with an RS232 cable an Instruction manual and two small cases with some spare parts in it.