Optoacoustic cell for measuring concentrations of chemical species in fluids in general.

摘要

An optoacoustic cell for measuring concentrations of chemical species in fluids in general comprises a body (31) with an inner cavity (32) to contain the fluid to be analyzed and be traversed by a light beam (15) in order to generate within the cavity (32) an acoustic signal of amplitude proportional to the concentration of the chemical species to be measured; to obtain an optoacoustic cell of high measurement sensitivity, one or more walls (41, 42) of the cavity are configured in such a manner as to concentrate the acoustic wave onto a substantially punctiform sensitive region (16) of an acoustic sensor (22). <IMAGE>