The DO (Dissolved Oxygen) Meter is specialized in quantifying the amount of oxygen dissolved in a liquid medium. It typically uses either galvanic or optical sensing methods. Galvanic sensors rely on an electrochemical reaction between oxygen and electrodes to generate an electric current, while optical sensors use fluorescence quenching by oxygen molecules. This DO meter is crucial in aquaculture, where maintaining proper dissolved oxygen levels is essential for fish survival and growth. In wastewater treatment plants, it monitors the efficiency of aerobic treatment processes. The Dissolved Oxygen Meter offers high - precision measurements, often able to detect dissolved oxygen down to very low levels. It can be easily calibrated, ensuring consistent and reliable results over time. Its design allows for use in both static and flowing liquid systems, providing flexibility in different laboratory and field setups.​