Dissolved oxygen (DO) sensors measure the amount of oxygen gas dissolved in a liquid, a critical parameter in water quality monitoring, environmental analysis, aquaculture, and wastewater treatment. Oxygen levels directly influence biological and chemical processes—low DO can harm aquatic life, while overly high levels may signal process imbalance. Reliable DO measurement ensures compliance, efficiency, and safety across various industries.

DO sensors typically operate using optical (luminescent) or electrochemical (polarographic or galvanic) methods. Optical DO sensors use a fluorescent layer that reacts to oxygen presence with a change in light properties, offering high stability and minimal maintenance. Electrochemical sensors, on the other hand, measure the current generated during the oxygen reduction process at the cathode, providing fast response in dynamic environments.

HH SCIENCE dissolved oxygen sensors integrate innovative features to meet modern demands: optical and polarographic designs, stainless steel housings for durability, IP68 waterproof ratings, and long-lasting membrane technology. Our sensors are engineered to withstand harsh industrial conditions, resist fouling, and minimize maintenance with options for self-cleaning and long-term stability. Whether you’re monitoring aquaculture tanks or municipal water treatment, HH SCIENCE offers advanced, customizable DO sensor solutions that deliver precise, reliable results every time.