DOS-1703 Portable Dissolved Oxygen Meter

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Shanghai BOQU Instrument Co., Ltd

Shanghai, China

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DOS-1703 portable dissolved oxygen meter is outstanding for ultra-low power microcontroller measurement and control, low power consumption, high reliability, intelligent measurement, using polarographic measurements, without changing the oxygen membrane. Having reliable, easy (one-hand operation) operation, etc.; the instrument can display dissolved oxygen concentration in two kinds of measurement results indicates, mg / L (ppm) and the oxygen saturation percentage (% ), in addition, measure the temperature of the measured medium simultaneously.
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).
What is 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
                                                            DO  0.00–20.0mg/L  0.0–200%  Temp  0…60℃ （ATC/MTC）  Atmosphere  300–1100hPa
                                                        
                                                            Resolution
                                                            DO  0.01mg/L,0.1mg/L(ATC）  0.1%/1%(ATC）  Temp  0.1℃  Atmosphere  1hPa
                                                        
                                                            Electronic unit measurement error
                                                            DO  ±0.5 % FS  Temp  ±0.2 ℃  Atmosphere  ±5hPa
                                                        
                                                            Calibration
                                                            At most 2 point, (water vapor saturated air/zero oxygen solution)
                                                        
                                                            Power supply
                                                            DC6V/20mA; 4 x AA/LR6 1.5 V or  NiMH 1.2 V and chargable
                                                        
                                                            Size/Weight
                                                            230×100×35(mm)/0.4kg
                                                        
                                                            Display
                                                            LCD
                                                        
                                                            Sensor input connector
                                                            BNC
                                                        
                                                            Data storage
                                                            Calibration data；99 groups measurement data
                                                        
                                                            Working condition
                                                            Temp  5…40℃  Relative humidity  5%…80% (without condensate)  Installation grade  Ⅱ  Pollution grade  2  Altitude  <=2000m