Oxygen Sensors & Transmitters

Oxygen Sensors & Transmitters

Oxygen sensors and transmitters provide continuous measurement of oxygen in liquids, supporting both dissolved oxygen (DO) control and oxygen monitoring in process and utility systems. The category is positioned for high-accuracy oxygen measurement across industries, reflecting how widely oxygen influences biological performance, corrosion rates, product quality, and treatment efficiency. In many systems, oxygen is a primary control variable rather than a simple indicator, particularly where energy use and compliance are tightly coupled.

Offerings typically include optical and amperometric measurement principles, allowing alignment of technology to application constraints such as response time, maintenance preference, or process conditions. Sensors are paired with transmitters that manage compensation, diagnostics, and signal outputs, and can be implemented within broader digital sensor ecosystems (e.g., Memosens and Liquiline product families). Installation approaches include immersion assemblies for basins and tanks, and flow-through designs for pressurized lines or clean-water loops.

The strongest value proposition is improved control of aeration and oxidation processes with reduced operating cost. In wastewater treatment, DO control directly affects nitrification stability and energy consumption, making reliable measurement critical to balancing compliance and power use. In industrial and power applications, oxygen monitoring helps manage corrosion risk in condensate and boiler feedwater systems. In fermentation and bioprocessing, stable oxygen measurement supports yield and reproducibility where oxygen transfer limitations can drive variability.

Typical applications include activated sludge basins, aeration control loops, and process water systems where oxygen content must be maintained or minimized. Additional deployments include beverage and food processes, life sciences and bioreactors, and utility systems where oxygen ingress indicates leakage or process compromise. Oxygen measurement is also used in environmental monitoring and aquaculture contexts where oxygen availability is directly tied to biological health and process outcomes.

Selection and lifecycle planning should account for fouling potential, required response time, and preferred maintenance approach (e.g., membrane service for amperometric vs. optical sensor handling). Installation geometry, bubble interference, and cleaning access often determine long-term stability more than specification-sheet accuracy. Transmitter and communications requirements typically include analog outputs and/or standard digital protocols for integration into aeration control, alarms, and historian-based optimization programs.

Field Instruments & Controls, Inc. an exclusive authorized representative of sales and service for Endress+Hauser.