DO2 Dissolved Oxygen
SENSOR WITH DATA LOGGING
- Measures dissolved oxygen and temperature.
- Integrated datalogger collects over 170,000 records.
- Utilizes fluorescence sensor technology.
- No membranes, fill solutions, replacement caps, or cartridges required.
- Includes new Aqua4Plus control software.
Description
Seametrics’ DO2 Smart Sensor is the next generation in trouble-free oxygen sensing design.
Utilizing fluorescence of a stable, immobilized ruthenium-based film matrix, the sensor provides precision optical transmission and detection to measure oxygen concentration in the fluid outside of the sensor.
Equipped with integrated datalogger and Aqua4Plus software, this sensor provides convenient, high-quality data to the user.
Features

- Sensor does not require water movement, flow, or frequent cleaning.
- Does not require frequent calibration.
- 1.66″ diameter—fits easily in 2-inch wells.
- RS485 Modbus® interface.
- Measures dissolved oxygen and temperature.
- Over 260,000 records in non-volatile memory.
- Fluorescence sensor technology.
- No membranes, fill solutions, replacement caps, or cartridges required.
- Includes new Aqua4Plus control software for setting up flexible recording sequences, retrieving data, monitoring real-time data, and viewing collected data.
Applications
- Dam discharge monitoring aquaculture.
- Leachate monitoring (Landfill).
- Long-term surface water monitoring.
- Monitoring remediation performance.
- Municipal and industrial water treatment facilities.
SPECIFICATION
GENERAL | |
Probe Diameter | 1.66” (4.22 cm) |
Tube Material | Acetal & 316 stainless steel or titanium |
Probe Material | Epoxy, polyurethane, and PVC |
Wire Seal Material | Fluoropolymer and PTFE |
Submersible Cable | Polyurethane, polyethylene, or ETFE available |
Terminating Connector | Available |
Communication | RS485 Modbus® RTU |
Direct Modbus Read Output | 32-bit IEEE floating point |
Internal Math | 32-bit floating point |
Operating Temp. Range | 0° C to 55° C |
Storage Temp. Range | -40° C to 80° C |
LOGGING | |
Memory | 260,000+ records |
Log Types | Variable, user-defined, logarithmic, profiled |
Programmable Baud Rate | 9600, 19200, 38400 |
Logging Rate | 8x/sec maximum |
Software | Complimentary Aqua4Plus and Aqua4Plus Lite |
Networking | 332 available addresses per junction w/ batching capabilities (up to 255) |
File Formats | .csv / .a4d |
SENSOR | |
Measuring Ranges | 0–25 ppm |
Accuracy | 1% of reading or 0.02 ppm — whichever is greater |
Sensitivity / Resolution | 0.01 ppm below 4.00, 0.1 ppm above 4.0 |
Stability | 0.01 ppm |
Repeatability | 0.01 ppm |
Sensor Drift | Less than 1% per year |
Temperature Range | 0° C to 55° C |
Response Time | 95% in less than 60 seconds |
Maximum Pressure | 100 PSI |
POWER | |
External Power Pack Required
Seametrics Power Packs available. Other power options available. |
9–16 Vdc |

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