Dosing system for a dishwasher machine

A dispensing system (1) for delivering at least one cleaning-agent preparation (A, B, C) into the interior of an automatic dishwasher, encompassing a dispenser (2) having a light source (4), and a cartridge (3) couplable to the dispenser (2), in which cartridge at least one flowable preparation (A, B, C) is stocked, wherein

• a. the cartridge (3) has a width (b) to depth (t) ratio from 3:1 to 20:1;
• b. the cartridge (3) has a height (h) to depth (t) ratio from 3:1 to 20:1;
• c. the walls of the cartridge (3) have a transmittance from 75% to 99% in the wavelength region between 700 nm and 1 mm;
• d. the flowable preparation (A, B, C) has a transmittance from 75% to 99% in the wavelength region between 700 nm and 1 mm;
• e. the outwardly directed surface of the cartridge (3) has a surface roughness between 0.5 and 5 microns;
• f. the light source (4), which emits light at least in a wavelength region between 700 nm and 1 mm into the cartridge;
• g. the light source (4) has an emission angle α greater than 5°, and
• h. the light source (4) and the cartridge (3) are configured in such a way that an average path length of the light beam (L) through the cartridge (3) corresponds to between 0.1*105 and 10*105 times the wavelength of the light emitted from the light source (4).