RS485 Luminescent Dissolved Oxygen Probe Requires No Calibration
The DRFN’s luminescent Dissolved Oxygen probe can be widely used in urban sewage treatment, industrial wastewater treatment, surface water monitoring, sea water monitoring, fish farming, aquarium, drinking water, etc. Dissolved Oxygen monitoring throughout wastewater treatment, and particularly in the activated sludge phase, is key to effective and efficient treatment.
Measuring Principle Of The Luminescent Dissolved Oxygen Probe
The luminescent Dissolved Oxygen probe covers the detection head(luminescent membrane cap) with a layer of luminescent material. The LED light source in the sensor emits blue light to the fluorescent material on the surface of the head (luminescent Membrane cap). The luminescent material is excited and emits red light. The higher the dissolved oxygen concentration, the shorter the time from emitting blue light to red light. Using the correlation between red light release time and dissolved oxygen concentration (release time), the dissolved oxygen analyzer calculates the dissolved oxygen concentration in the medium.
Advantages of The Luminescent Dissolved Oxygen Probe
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The DRFN OPD70 LDO probe can meet various works without calibration.
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The sensor is equipped with digital communication Modbus RS485 protocol.
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Compact and light, the LDO probe can be conveniently connected to online transmitters, DTUs, and portable instruments.
- The protection grade of the LDO sensor is IP68, it can work continuously and stably under water for a long time.
- No need to consume oxygen, especially at very low oxygen concentration for accurate measurement.
Technical Parameter
| Product Name | Luminescent Dissolved Oxygen Probe |
| Product Model | OPD70 |
| Measure Principle | Optical measure by luminescence |
| Measure Range | 0.00 to 20.00 mg/L 0-200% |
| Resolution | 0.01 |
| Accuracy | 0.1mg/L 1% |
| Response Time | 90% of the value in less than 60 seconds |
| Temperature Compensation | Built-in temperature unit, automatic temperature compensation |
| Calibration Method | Zero position/slope/deviation |
| Operating Temperature | 0°C ~ 50°C |
| Signal Interface | Modbus RS485 |
| Dimensions | Diameter: 25 mm; Length: 150 mm |
| Working Pressure | 0~3 bars |
| Material | PPS |
| Weight | 450g |
| Protection Grade | IP68 |
The Matching Dissolved Oxygen Controllers Recommendation
| Product Name | Dissolved oxygen controller |
| Product Model | DUC2-DO-S | DUC2-DO-H |
| OTA | default wifi | No |
| Software Version | DRFN DO Analysis software V1.0 |
| DO Concentration Display Range | 0-50mg/L |
| DO Saturation Display Range | 0-400% |
| TEMP Display Range | -10～500℃ /14~932℉ |
| Atmospheric Pressure Display Range | 30-120kpa |
| Salinity Compensation Range | Input range0.0001-99999ppt |
| Relay Control | 2 settable SPST relays max. load 3A/250VAC |
| Analog Current Output | 2 settable 0/4~20mA active current loop output max. load 1000Ω |
| Communication Method | MODBUS RTU; support JSON text data format |
| Display Screen | 128*64 LCD |
| Time History/Data Record | Year/month/day/hour/min/second, record 14000 historical data |
| Protection Level | IP66 |
| Operating Environment | 0～60℃, relative humidity less than 95% |
| Storage Environment | -20～70℃, relative humidity less than 55% |
| Shell Material | Enhanced ABS |
| Size | 144*144*120mm (hole size 138*138 mm) |
| Mounting Method | Wall mounting, pipe clamping, panel installation |
| Power Supply | 18-36V DC or 100~240V |
| Weight | 800g |
Product Tags:
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RS485 Luminescent Dissolved Oxygen Probe Requires No Calibration Images
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