Description
When the excitation light shines on the fluorescent substance on the surface of the fluorescent membrane head, the substance becomes excited and emits fluorescence. The extinguishing time of this fluorescence is affected by the concentration of oxygen molecules on the surface of the fluorescent membrane head. The oxygen concentration can be calculated by detecting the phase difference between the fluorescence and the excitation light and comparing it with the internal calibration curve. The final value is then output after temperature and salinity compensation.
