DOG-208F 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 product.

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
                                                            0-100ug/L 0-20mg/L
                                                        
                                                            Measured water temperature
                                                            0~60℃
                                                        
                                                            Calibration intervals
                                                            >60 days
                                                        
                                                            Electrode material
                                                            316L stainless steel
                                                        
                                                            Temperature compensation resistor
                                                            2.252K 22K Ptl00 Ptl000 etc
                                                        
                                                            Sensor life
                                                            >3 years
                                                        
                                                            Cable length
                                                            5m (double shielded)
                                                        
                                                            Detection lower Limit
                                                            0.1ug/L(ppb)(20℃)
                                                        
                                                            Measurement upper limit
                                                            20mg/l(ppm)
                                                        
                                                            Response time
                                                            ≤3min(90％,20℃)
                                                        
                                                            Polarization time
                                                            >8h
                                                        
                                                            Minimum flow rate
                                                            5cm/s; 515 L/h
                                                        
                                                            Drift
                                                            <3%/month
                                                        
                                                            Measurement error
                                                            <±1 ppb
                                                        
                                                            Air current
                                                            50-80nA
                                                        
                                                            Note
                                                            Maximum current 20-25 uA
                                                        
                                                            Polarization voltage
                                                            0.7V
                                                        
                                                            Zero Oxygen
                                                            <5ppb(60min)

Thermal power plants
Power plant desalted water
Boiler feed water
Places of trace oxygen content.

DOG-208F Dissolved Oxygen Electrode is applicable to Polarography Principle.
With platinum (Pt) as the cathode and Ag / AgCl as an anode.
The electrolyte is 0.1 M potassium chloride (KCI).
The silicone rubber permeable membrane imported from the U.S. serves as the permeable membrane.
It has silicone rubber and steel gauze.
It is featured collision resistance, corrosion resistance, and high. temperature resistance, shape retention, and other performances.