Description
Forbes Marshall Aqua 4Trans is a robust dissolved oxygen analyzer built for continuous aeration control in ETP/STP basins, biological reactors, aquaculture systems, and process water tanks. With advanced optical DO sensing, fast response, multi-parameter compensation, and industrial-grade transmitters, it ensures reliable DO monitoring with minimal maintenance and high long-term stability.
🔧 Aqua 4Trans — Key Technical Data & Selection Parameters
| Parameter | Specification / Details |
| Measurement Principle | Optical Luminescent DO (LDO) – membrane-free |
| DO Measuring Range | 0 – 20 mg/L (0–200% saturation) |
| Accuracy | ±0.1 mg/L or ±1% of reading |
| Response Time | < 60 seconds (typical) |
| Temperature Compensation | Automatic via integrated Pt100 sensor |
| Pressure / Salinity Compensation | Auto-compensation for true DO values |
| Process Temperature | 0 °C to 50 °C |
| Process Pressure | Up to 6 bar |
| Sensor Design | Maintenance-free optical probe, long-life cap |
| Transmitter Type | 4-wire field transmitter with diagnostics |
| Output | 4–20 mA, Modbus/RS485 optional |
| Display | Backlit LCD with multi-parameter view |
| Housing | IP65/67, outdoor-rated ABS/SS enclosure |
| Power Supply | 230 VAC / 24 VDC (model-dependent) |
| Calibration | Air calibration / 1-point factory-assisted |
| Suitable Media | Wastewater, process water, biological tanks |
| Typical Applications | STP aeration basins, ETP biological tanks, aquaculture ponds, fermentation DO monitoring |




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