A fluorescent dissolved oxygen electrode is a type of dissolved oxygen sensor that uses fluorescence to measure the concentration of dissolved oxygen in a liquid. This type of sensor typically consists of a fluorescent indicator dye that is sensitive to oxygen, and an optical detector that measures the amount of fluorescence emitted by the dye.
When the fluorescent dissolved oxygen electrode is placed in a liquid, the dissolved oxygen in the liquid reacts with the dye, causing it to fluoresce. The amount of fluorescence emitted by the dye is proportional to the concentration of dissolved oxygen in the liquid.
The optical detector then measures the fluorescence emitted by the dye, and uses this information to calculate the concentration of dissolved oxygen in the liquid. This is typically done by comparing the measured fluorescence to a known standard, or by using a calibration curve.
Fluorescent dissolved oxygen electrodes are generally considered to be more accurate and precise than other types of dissolved oxygen sensors, and are commonly used in water quality applications, such as monitoring the concentration of dissolved oxygen in rivers, lakes, and other bodies of water. They are also used in industrial processes, such as wastewater treatment, to monitor the amount of oxygen present in the water.