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
Appearance, connectors and accessories are confirmed with the ordered configuration.
Specifications & version options
| 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 |
SG codes for enquiry
28 sourcing references from “Water-quality electrodes and probes”. Put an SG code in the RFQ so we can match the same catalog row.
SG-WQE-101SG-WQE-102SG-WQE-103SG-WQE-105SG-WQE-106SG-WQE-107SG-WQE-108SG-WQE-109SG-WQE-104SG-WQE-110SG-WQE-111SG-WQE-112SG-WQE-115SG-WQE-118SG-WQE-124SG-WQE-127SG-WQE-128SG-WQE-113SG-WQE-114SG-WQE-119SG-WQE-120SG-WQE-121SG-WQE-122SG-WQE-123SG-WQE-116SG-WQE-117SG-WQE-125SG-WQE-126
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.
- The quotation confirms the final model, configuration, certificate requirements, price and availability.
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
These are typical reviewed options for this product family, not a single orderable SKU. Final model, connectors, certificates and availability are confirmed in the quotation.