Final configuration is confirmed in the quotation.
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.
Start with the information you have. Exact model, interface and certificates are confirmed in writing before order.
Image details
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.
Related solution: Water Monitoring
Where the hardware sits in the monitoring path
A planning view, not a fixed bundle. Signal type, protocol, power, network and the customer endpoint are confirmed before quotation.
Customer system
SCADA, BMS or customer-owned platform
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
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How the model is selected
The written quotation ties the site requirement to one reviewed hardware configuration.
Site requirement
Application, medium, mounting and environment
Hardware configuration
Signal, protocol, power and enclosure
Quote confirmation
Model, quantity, certificates and delivery
Remote integration context
Representative site context. Sensors, interfaces, enclosure, power and mounting are confirmed against the actual project before quotation.
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.
Show 3 more reviewed selection notes
Model-selection reference
Water & Utilities Hardware Catalog
Use this audited section to compare available hardware configurations. The representative website image is not an exact model photograph; the ordered configuration is confirmed in the quotation.
- Catalog section
- Water-quality electrodes and probes
- SG-coded options
- 28
- PDF pages
- 4
Continue product selection
Compare adjacent hardware families for the same monitoring path. The final combination is checked against the project I/O, protocol, power and enclosure requirements.
How to choose
- Select Type A, B or C from the water chemistry, 0–20 or 0–50 mg/L range, required ±0.3 or ±0.2 mg/L accuracy, response time and wetted-material requirement.
- Use the simultaneous RS485 Modbus RTU and 4-20 mA outputs only after the receiving PLC, RTU or logger inputs, register map and 7–28 VDC supply have been checked.
- Provide immersion depth or pipe geometry, NPT3/4 mounting, pressure, temperature, cable run, bubble risk and cleaning / calibration access.
Compatible with
- PLC, RTU or water-quality controller accepting RS485 Modbus RTU and 4-20 mA
- 4G or Ethernet telemetry gateways with a documented RS485 register map
- Pipe or immersion installations within the reviewed pressure and temperature limits
- Aquaculture, aeration-basin and surface-water monitoring points with planned cleaning and calibration access
Typical package
- Selected Type A, B or C optical dissolved-oxygen probe
- 5 m field cable as the reviewed default; other length stated in the quotation
- Optional bracket or NPT3/4 pipe hardware selected for the installation
- PLC, RTU, controller or telemetry gateway only when listed in the quotation
- Register-map, wiring, calibration and maintenance notes for the ordered configuration
Applications
Use this fluorescence optical probe for continuous dissolved-oxygen monitoring in aquaculture tanks, wastewater aeration basins, surface water and compatible process-water points. Select Type A, B or C from the required range, accuracy, response time, wetted materials and water chemistry; the variants are not interchangeable.
- 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
What to include in your quote request
- Application, water chemistry and expected normal / upset dissolved-oxygen range
- Required Type A / B / C accuracy and response time
- Water temperature, pressure, flow, immersion depth or pipe installation
- Receiving PLC / RTU / logger, RS485 register-map needs, analog input and available 7–28 VDC supply
- Cable length, bracket or NPT3/4 hardware, cleaning / calibration plan, quantity and project stage
Related selection guides
Related resources
Frequently asked questions
Which dissolved-oxygen range and accuracy should I order?
Type A is 0–20 mg/L at ±0.3 mg/L. Types B and C can be 0–20 or 0–50 mg/L at ±0.2 mg/L. Share the water type, expected normal and upset range, response requirement and corrosion conditions so the correct type can be quoted.
Does the probe provide both RS485 and 4-20 mA?
Yes. The reviewed electrical configuration provides RS485 Modbus RTU and 4-20 mA simultaneously. Confirm the PLC, RTU or logger input, register map, cable length and power arrangement before commissioning.
What calibration and maintenance does an optical DO sensor need?
The reviewed manual documents air and zero-oxygen calibration. Keep the fluorescent surface clean, prevent bubbles from remaining on it and inspect the fluorescent cap. Cap life depends on use and water conditions; it is not a maintenance-free item.
Can the dissolved-oxygen probe be used in a pipe or under water?
The reviewed scope supports pipe or immersion installation, IP68 protection, NPT3/4 upper and lower threads, operation from -5 to +60 °C and working pressure up to 0.8 MPa. The bracket, insertion arrangement and service access still need site review.
What should I provide when requesting a quote for the Optical Dissolved Oxygen Sensor for Water & Wastewater?
Application, water chemistry and expected normal / upset dissolved-oxygen range; Required Type A / B / C accuracy and response time; Water temperature, pressure, flow, immersion depth or pipe installation; Receiving PLC / RTU / logger, RS485 register-map needs, analog input and available 7–28 VDC supply
Where can I compare available model options?
Open the Water & Utilities Hardware Catalog linked on this page. It lists audited SG-coded selections; the ordered configuration is confirmed in the quotation.
Will it work with my existing system?
Compatibility is reviewed against your field signals, protocols and upstream platform. Typical pairings include PLC, RTU or water-quality controller accepting RS485 Modbus RTU and 4-20 mA, 4G or Ethernet telemetry gateways with a documented RS485 register map, Pipe or immersion installations within the reviewed pressure and temperature limits.