| abstract |
The invention relates to an optical method and to an optical device based on a laser source for implementing the optical method for nonintrusively measuring the temperature of a flowing liquid by using the fluorescence induced by a laser beam in a measurement volume ( 3 ) of the liquid, the process consisting in using a single temperature-sensitive fluorescent tracer and at least two separate spectral detection windows on this same tracer, after molecular dilution of said tracer in said liquid medium. |