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The digital dissolved oxygen sensor is designed based on the principle of quenching excited fluorescence by specific substances in physics. When the excitation light is irradiated on the fluorescent substance on the surface of the fluorescent membrane head, the fluorescent substance is excited, fluorescence is emitted, and the extinguishing time of fluorescence is affected by the concentration of oxygen molecules on the surface of the fluorescent membrane head. The concentration of oxygen molecules can be calculated by detecting the phase difference between fluorescence and excitation light and comparing it with the internal calibration curve, and the final value can be output by temperature and salinity compensation. This dissolved oxygen sensor can be used with the dissolved oxygen controller and they are widely used in sewage treatment plants, waterworks, industrial production processes, aquaculture and other industries to monitor the dissolved oxygen value in real time.
| Product Name | Dissolved oxygen sensor |
| Product Model | OPD790 |
| Brand Name | Daruifuno |
| Signal Output | RS485 Modbus |
| Measuring Range | Oxygen content: 0.00~20.00 mg/L |
| Saturation: 0~200% | |
| Temperature: 0~50℃ | |
| Accuracy | oxygen content: ±0.1 mg/L saturation: ±1% temperature: ±0.5℃ |
| Response Time | 0-> 100 % ; T90<25s； 100 -> 0%；T90< 30s |
| Compensation | Automatic temperature compensation, built-in temperature unit |
| Other Compensation | salinity compensation, pressure compensation |
| Calibration Method | Zero calibration and full scale calibration |
| Working Pressure | 0~3Bar |
| Operating Temp. | 0~50℃ |
| Material | Body: PPS or ABS Head: 316 SS |
| Connection | M16 |
| Power Supply | 6~12V DC |
| Dimensions | Diameter 35mm, Total length 250 mm |
| Installation | A British 1 NPT of the head and the tail for each install thread |
| Protection Grade | IP68 |
| Weight | 260g |
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