DOG-209F Industrial Dissolved Oxygen Sensor

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Shanghai BOQU Instrument Co., Ltd

Shanghai, China

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What is Dissolved Oxygen (DO)?
Dissolved oxygen is a measure of the amount of gaseous oxygen contained in water. Healthy waters that can support life must contain dissolved oxygen (DO).
Dissolved Oxygen enters the water by:
direct absorption from the atmosphere.
rapid movement from winds, waves, currents, or mechanical aeration.
aquatic plant life photosynthesis as a by-product of the process.
Why Monitor Dissolved Oxygen?
Measuring dissolved oxygen in water and treatment to maintain proper DO levels, are crucial functions in a variety of water treatment applications. While dissolved oxygen is necessary to support life and treatment processes, it can also be detrimental, causing oxidation that damages equipment and compromises products.

Dissolved oxygen affects:
Quality: The DO concentration determines the quality of the source water. Without enough DO, the water turns foul and unhealthy affecting the quality of the environment, drinking water, and other products.
Regulatory Compliance: To comply with regulations, wastewater often needs to have certain concentrations of DO before it can be discharged into a stream, lake, river, or waterway. Healthy waters that can support life must contain dissolved oxygen.
Process Control: DO levels are critical to controlling the biological treatment of wastewater, as well as the biofiltration phase of drinking water production. In some industrial applications (e.g. power production) any DO is detrimental to steam generation and must be removed and its concentrations must be tightly controlled.

                                                            Measuring range
                                                            0-20mg/L
                                                        
                                                            Measuring principle
                                                            Current sensor (Polarographic electrode)
                                                        
                                                            Permeable membrane thickness
                                                            50 um
                                                        
                                                            Electrode shell material
                                                            U PVC or 31 6L stainless steel
                                                        
                                                            Temperature compensation resistor
                                                            Ptl00, Ptl000, 22K, 2.252K etc.
                                                        
                                                            Sensor life
                                                            >2 years
                                                        
                                                            Cable length
                                                            5m
                                                        
                                                            Detection lower limit
                                                            0.01 mg/L (20℃)
                                                        
                                                            Measurement upper limit
                                                            40mg/L
                                                        
                                                            Response time
                                                            3min (90%, 20℃)
                                                        
                                                            Polarization time
                                                            60min
                                                        
                                                            Minimum flow rate
                                                            2.5cm/s
                                                        
                                                            Drift
                                                            <2%/month
                                                        
                                                            Measured water temperature
                                                            0-60℃
                                                        
                                                            Measurement error
                                                            <± 0.1mg/I
                                                        
                                                            Output current
                                                            50~80nA/0.1mg/L
                                                        
                                                            Note
                                                            Maximum Current 3.5uA
                                                        
                                                            Polarization voltage
                                                            0.7V
                                                        
                                                            Zero oxygen
                                                            <0.1 mg / L (5min)
                                                        
                                                            Calibration intervals
                                                            >60 days

Urban sewage treatment
Industrial wastewater treatment
Aquaculture
Environmental monitoring.

DOG-209F Dissolved Oxygen electrode has high stability and reliability, which can be used in the harsh environment; it demands less maintenance; it is suitable for continuous measurement of the dissolved oxygen in the fields of urban sewage treatment, industrial wastewater treatment, aquaculture, environmental monitoring, etc.