Optical measuring unit and optical measuring method for obtaining measurement signals of fluid media

An optical measurement unit for obtaining measurement signals from liquid media which are present in cuvettes lined up next to one another, each cuvette having a lateral inlet window and at least one lateral outlet window, the optical measurement unit comprising:

• a light-supplying unit configured and arranged for emitting spectrally different inlet radiations in temporal succession into the inlet window of each cuvette, the light-supplying unit having a plurality of LED light sources which emit in a spectrally different manner in the UV/VIS/NIR wavelength range, and
• a detection unit configured and arranged for detecting a measurement radiation exiting from the at least one outlet window of each cuvette and for converting the measurement radiation into an electrical measurement signal,
• wherein the cuvettes lined up next to one another form a stationary cuvette array, and the detection unit includes a plurality of photodiodes, at least one of the plurality of photodiodes being fixedly assigned to each outlet window of each cuvette of the cuvette array.