September 21, 2026
In an era of increasingly stringent water quality monitoring requirements, reliable and efficient measurement solutions have become essential. The Endress+Hauser COS41-4F dissolved oxygen sensor stands out as an industry leader, offering exceptional performance across diverse applications to provide unprecedented accuracy in water treatment processes.
Dissolved oxygen remains a critical parameter affecting numerous water treatment applications, from optimizing biochemical reactions in municipal wastewater plants to maintaining ecological balance in drinking water sources and ensuring strict industrial process control. Traditional measurement methods often suffer from slow response times, insufficient accuracy, and demanding maintenance requirements, falling short of modern demands for real-time, precise data.
As a global leader in measurement, automation, and digital solutions, Endress+Hauser continues to deliver cutting-edge technology. The COS41-4F dissolved oxygen sensor exemplifies this commitment through its advanced amperometric two-electrode measurement principle, enabling high-precision, stable real-time monitoring of dissolved oxygen content. Its intelligent design and simple operation allow seamless integration into various water treatment systems, providing robust data support for operational decisions.
The sensor's measurement range of 0.05 to 20 mg/l enables detection of even subtle dissolved oxygen fluctuations, allowing timely identification of potential issues. Whether in low-oxygen environments or oxygen-rich conditions, the device delivers reliable results.
The two-electrode amperometric system offers greater stability and extended service life compared to conventional electrochemical sensors. This technology significantly reduces membrane fouling and electrolyte consumption, minimizing maintenance requirements and lowering operational costs.
Designed for demanding water and wastewater treatment applications, the COS41-4F performs exceptionally in municipal wastewater aeration control, industrial wastewater biodegradation monitoring, and aquaculture ecosystem management.
Manufactured with high-quality materials, the sensor withstands harsh industrial conditions including corrosive media and extreme temperatures, ensuring consistent performance under demanding operational circumstances.
With standard G1 and NPT3/4 threaded connections and a fixed 15-meter cable, the sensor accommodates various piping configurations and installation layouts with ease.
Beyond the COS41-4F model, Endress+Hauser offers a complete range of dissolved oxygen sensors to meet diverse requirements:
Accurate dissolved oxygen measurement remains fundamental to optimizing water treatment processes, reducing operational costs, and ensuring environmental safety. The Endress+Hauser COS41-4F sensor, with its advanced technology and proven performance, represents a significant advancement in water quality monitoring capabilities.
