Optical dissolved oxygen sensor from JUMO for precise measurement of dissolved oxygen in water and process media JUMO digiLine O-DO S10 – Intelligent Sensor for Dissolved Oxygen The JUMO digiLine O-DO S10 is an optical dissolved oxygen sensor designed for reliable monitoring of dissolved oxygen in water and process media. It combines low-maintenance operation with digital and analog communication for stable process and water quality control. The sensor from JUMO is an intelligent sensor that operates according to the optical luminescence quenching principle, providing stable and low-drift measurement values for demanding water analysis applications. Thanks to the optical measuring method, traditional maintenance tasks such as electrolyte replacement or polarization phases are eliminated, significantly simplifying operation and increasing availability during ongoing processes. At the same time, the robust design ensures reliable use in both freshwater and saltwater applications. The measured values are automatically temperature compensated and can additionally be corrected for environmental conditions such as air pressure or salinity. This ensures particularly high measurement accuracy under changing process conditions. For integration into existing systems, the sensor offers both digital communication via RS-485 Modbus RTU and an analog 4–20 mA two-wire signal. Configuration and calibration data are stored directly in the sensor and can be retrieved when required, providing a traceable calibration history. An integrated logbook documents the most recent calibrations, while a self-diagnostic function continuously monitors operating status and provides notifications in the event of deviations. The sensor cap is replaceable, further simplifying maintenance. Advantages optical measurement without electrolyte consumption no polarization required low-maintenance sensor solution with long calibration intervals stable and low-drift measurement values automatic temperature compensation digital and analog signal transmission available integrated self-diagnostics and calibration history easy sensor cap replacement in case of wear Technical Data Product: JUMO digiLine O-DO S10 Measured parameter: dissolved oxygen (DO) Measuring principle: optical (luminescence quenching according to ASTM D888-05) Output: RS485 Modbus RTU / 4–20 mA two-wire Communication: digital and analog Cable: permanently attached, 5-pin M12 connector Housing material: PVC Temperature compensation: automatic Additional functions: calibration memory, logbook, self-diagnostics Connection: Rp 1 or optional G 1 thread with mounting kit Cable length: 10 m Typical Applications drinking and service water monitoring wastewater treatment plants and wastewater technology aquaculture and fish farming process water monitoring environmental and water analysis Frequently Asked Questions What can I use the oxygen sensor for? To display and measure dissolved oxygen in water or liquids. How accurately does the device measure oxygen? It uses state-of-the-art optical technology to provide stable, long-term reliable readings. The measurement is based on the optical principle of luminescence quenching in accordance with ASTM D888-05. Can I transmit the readings to my control system? Yes, via a digital RS485 interface or as an analogue 4–20 mA signal. Does the sensor display the readings itself? No. The sensor provides the readings, which are displayed, for example, on a meter or PC. Is the sensor robust and suitable for use in water? Yes, it has a robust PVC housing and is suitable for fresh and salt water. Why is dissolved oxygen important in the first place? It indicates water quality, e.g. in fish farming, sewage treatment plants or industrial processes.

The JUMO digiLine O-DO S10 is a modern, intelligent sensor for measuring dissolved oxygen. The measurement is based on the optical principle of luminescence quenching according to ASTM D888-05. This offers users numerous advantages: No electrolyte replacement required No polarization voltage necessary No minimum flow required Longer calibration intervals thanks to low drift behavior Long-term stable and reliable measurement results Temperature compensation is performed automatically, so that the measured value is always output temperature-compensated. In addition, the sensor can also correct the measured value with regard to air pressure and salinity (using external sensors). The JUMO digiLine O-DO S10 has two interfaces for transferring the measured values to higher-level systems or automation solutions: digitally via an RS485 interface with Modbus RTU protocol or analogically via a 4...20 mA two-wire signal. Configuration, parameterization, and calibration data are stored in the sensor's electronics. Sensor-specific information and measuring point identifiers can also be stored there and read out as needed. In addition, the sensor offers a logbook that documents the last ten successful calibrations, providing an overview of the calibration history. To support operational safety, the sensor is equipped with a self-diagnostic function that issues warnings or error messages in the event of malfunctions. The sensor features a slim, robust design. The sensor cap can be easily replaced when worn. The sensor body is made of durable PVC and is therefore suitable for applications in fresh and salt water. A permanently attached cable with a 5-pin M12 connector ensures quick and easy connection to measuring or automation devices. The sensor offers two connection options for installation: an Rp 1 thread directly on the sensor shaft or, alternatively, an optionally available mounting kit with a G 1 thread. Frequently Asked Questions What can I use the oxygen sensor for? To display and measure dissolved oxygen in water or liquids. How accurately does the device measure oxygen? It uses state-of-the-art optical technology to provide stable, long-term reliable readings. The measurement is based on the optical principle of luminescence quenching in accordance with ASTM D888-05. Can I transmit the readings to my control system? Yes, via a digital RS485 interface or as an analogue 4–20 mA signal. Does the sensor display the readings itself? No. The sensor provides the readings, which are displayed, for example, on a meter or PC. Is the sensor robust and suitable for use in water? Yes, it has a robust PVC housing and is suitable for fresh and salt water. Why is dissolved oxygen important in the first place? It indicates water quality, e.g. in fish farming, sewage treatment plants or industrial processes.