An absorption cell for microfluidic chemical analysis made from tinted or colored polymers, for example polymethylmethacrylate, in which microfluidic channels are cut. The coupling includes base elements and a plurality of tabs formed integrally with the base elements at node areas. To improve the dynamic balance of the transducer, a first cantilever and a second cantilever are rigidly fixed to an inlet-side tube section and an outlet-side tube section, respectively.