The invention relates to a portable electronic photometer for water analysis. According to the invention, the photometer comprises a base plate (), two axes () of rotation whereon there are mounted two identical toothed wheels () which reciprocally drive each other, each wheel continuing with a crown (), the first crown () being provided with a number of cylindrical seats, six for example, wherein there are vertically located some glass tubes () containing some water samples to be analyzed, and the second crown () being provided with six dispensing systems () containing a reagent specific to a chemical species present in the water sample, and a mechanical divider, with an angular increment of 60° having the role of bringing successively each sample in front of one of the dosing systems () which, by manual handling, transfers a specific reagent into the water sample, then said water sample being brought in front of a photobarrier which carries out the photometering of the water at a wavelength specific to a desired chemical species, the specific wavelengths being ensured by some suitable filters mounted in front of the water samples.
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