Abstract: Spectrophotometric analysis device having a feeder circuit of a test stand. The analysis device has two distinct spectrophotometers facing the same test stand, especially in order to be able to cover spectra with wavelengths that are separate and included in the wavelengths on either side of the visible range. A first spectrophotometer covers the spectrum of the near and mean infrared ranges while a second spectrophotometer covers the spectrum of the ultraviolet and visible ranges. This analysis device provides especially for the spectrophotometric determination of the different constituents contained in fluids to be analysed, such as wine, fruit juice or blood.