Description
1.Structural features The whole measurement system is mainly composed of two parts: instrument (secondary table) and dissolved oxygen electrode (primary table). The dissolved oxygen electrode contacts the measured solution, and the instrument shows the oxygen content, temperature and working state of the aqueous solution.
2.The fluorescence dissolved oxygen probe consists of three parts: optical path system, fluorescence sensitive film and optical detection system. After the probe is inserted into the medium to be measured, the oxygen in the medium immediately diffuses into the silicone molecular layer and quickly reaches equilibrium. The modulated blue light is hit to the fluorescent layer, and the fluorescent molecules produce red fluorescence. The fluorescent molecules are quenched after encountering oxygen, and the fluorescence intensity and response time change with the oxygen content. Oxygen content was determined by detecting the change in fluorescence response time.