An optical dissolved oxygen meter is a device used to measure the concentration of dissolved oxygen in a liquid, typically water. Unlike traditional dissolved oxygen meters that rely on electrochemical sensors, optical dissolved oxygen meters utilize optical technology to determine the oxygen levels.

The working principle of an optical dissolved oxygen meter involves a luminescent material, usually a fluorescent dye, embedded in a sensor probe. When exposed to light, the dye emits fluorescence that is affected by the presence of oxygen. The intensity of the fluorescence is inversely proportional to the concentration of dissolved oxygen in the liquid.

To measure dissolved oxygen, the optical dissolved oxygen meter emits light onto the sensor probe and detects the fluorescence emitted by the dye. By analyzing the intensity of the fluorescence, the meter can determine the oxygen concentration in the liquid.

Optical dissolved oxygen meters offer several advantages over electrochemical meters. They are generally more durable, have a longer lifespan, and require less frequent calibration. They also provide faster response times and are less affected by temperature variations and electrode fouling.

These Optical dissolved oxygen meters are commonly used in various applications, including environmental monitoring, water treatment, aquaculture, and research laboratories. They enable accurate and reliable measurements of dissolved oxygen levels, helping to assess water quality, optimize processes, and ensure the health and survival of aquatic organisms.