DOG-209FA 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.

                                                            Ultra resistant to pressure
                                                            (0.6Mpa) wallop, imported (grit mesh metal membrane) .
                                                        
                                                            Up thread
                                                            M32 * 2.0
                                                        
                                                            Temperature compensation resistance
                                                            Pt100, Pt1000, 22K, 2.252K, etc
                                                        
                                                            Measuring range
                                                            0-20mg / L
                                                        
                                                            Measuring principle
                                                            Current type sensor (polarographic electrode)
                                                        
                                                            Breathable membrane thickness
                                                            100μm
                                                        
                                                            Electrode shell material
                                                            PVC or 316L stainless steel
                                                        
                                                            Sensor life
                                                            > 2 years
                                                        
                                                            Minimum flow rate
                                                            2.5cm / s
                                                        
                                                            Drift
                                                            <2% / month
                                                        
                                                            Cable length
                                                            5m
                                                        
                                                            Detection limit
                                                            0.01 mg / L (20 ℃)
                                                        
                                                            Measurement limit
                                                            40 mg / L
                                                        
                                                            Response time
                                                            2min (90%, 20 ℃)
                                                        
                                                            Polarization time
                                                            60min
                                                        
                                                            Measurement error
                                                            <± 0.01 mg / L
                                                        
                                                            Measured water temperature
                                                            0-60 ℃
                                                        
                                                            Output Current
                                                            50-80nA/0.1 mg / L
                                                        
                                                            Note
                                                            Maximum current 3.5uA
                                                        
                                                            Polarization voltage
                                                            0.7V
                                                        
                                                            Zero oxygen
                                                            <0.01 mg / L
                                                        
                                                            Calibration interval
                                                            > 60 days

Used in a more harsh environment, maintenance volume is smaller
Suitable for urban sewage treatment, industrial wastewater treatment, aquaculture, environmental monitoring, and other fields of continuous measurement of dissolved oxygen.

DOG-209FA type oxygen electrode improved from the previously dissolved oxygen electrode, change diaphragm into a grit mesh metal membrane, with high stability and stress resistance, can be used in a more harsh environment, maintenance volume is smaller, suitable for urban sewage treatment, industrial wastewater treatment, aquaculture, and environmental monitoring and other fields of continuous measurement of dissolved oxygen.