Abstract: The disclosure relates to monitoring or controlling bioprocesses by way of withdrawing discrete fluid samples from a reactor and performing on-line analysis of said sample using a fluidic manifold, for example, by way of a sensor based on label-free biomolecular interaction analysis. The disclosure relates to a system for measuring one or more analytes in discrete fluid samples from a vessel adapted to contain a fluid having one or more sensors for the measurement of the analytes in a contact volume of the fluid sample. An analysis module having at least one main sampling line in fluidic connection with the vessel and one or more pumps in fluidic connection with said main sampling line(s) and adapted to selectively pump fluid from in the main sampling line away from the vessel. At least one fluid distribution tubing in fluidic connection with the analysis module. A manifold has a body.