Optical Dissolved Oxygen Sensor for Water & Wastewater
Continuous fluorescence optical DO probe for aquaculture, aeration basins and surface water, with simultaneous RS485 Modbus RTU and 4-20 mA outputs.
Category: Water & Wastewater Instrumentation
Representative image
Representative optical dissolved-oxygen probe visual interpreted from a reviewed exact-product specification and independently de-identified. It is not an exact product photograph; probe type, range, wetted materials, output, cable, mounting, maintenance items, markings and certificates are confirmed in the quotation.
Specifications
| Measurement principle | Fluorescence optical DO with temperature compensation |
|---|---|
| Type A range / accuracy | 0–20 mg/L / ±0.3 mg/L |
| Type B / C range / accuracy | 0–20 or 0–50 mg/L / ±0.2 mg/L |
| Resolution | 0.01 mg/L DO; 0.1 °C temperature |
| Temperature channel | 0–60 °C / ±0.5 °C via RS485 |
| Response time | Type A T90 <100 s; Type B / C T90 <40 s |
| Outputs | RS485 Modbus RTU and 4–20 mA simultaneously |
| Supply / power | 7–28 VDC / <0.2 W |
| Installation | Pipe or immersion; upper and lower NPT3/4 threads |
| Environment | IP68; -5 to +60 °C; up to 0.8 MPa |
| Cable | 5 m reviewed default; other lengths quoted by project |
| Maintenance | Cleaning, air / zero calibration and fluorescent-cap inspection required |
Choose the dissolved-oxygen type before quotation
The reviewed product record contains three probe types with different range, accuracy, response and wetted-material scopes.
- Type A covers 0–20 mg/L at ±0.3 mg/L with T90 under 100 seconds for freshwater, aquaculture and similar general-water duties.
- Types B and C cover 0–20 or 0–50 mg/L at ±0.2 mg/L with T90 under 40 seconds; the wetted-material scope differs between the performance and anti-corrosion versions.
- The reviewed electrical configuration provides RS485 Modbus RTU and 4-20 mA at the same time. RS485 data includes dissolved oxygen, saturation and temperature.
- The conservative supply limit shared by the reviewed specification and manual is 7–28 VDC. Final cable, controller input, grounding and surge protection are checked with the site.
- The fluorescent surface must be kept clean and free of bubbles. Air and zero-oxygen calibration are documented; fluorescent-cap condition and replacement remain maintenance items.
- Supplier identity, model number, certificates, stock, price and a claim that the representative image is the final ordered product are excluded from the public scope.
Typical applications
- Aquaculture dissolved-oxygen monitoring with temperature compensation
- Wastewater aeration-basin trend monitoring and alarm input
- River, channel and surface-water dissolved-oxygen stations
- RS485 or 4-20 mA measurement points connected to an existing PLC, RTU or logger
Inquiries: contact@sungeneiot.com · sungeneiot.com
Specifications are for reference and may be updated; confirm the final spec with SunGene before ordering.