Wuxi Daoxin Technology Co., Ltd.
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The DX-DO3000 Online Dissolved Oxygen Meter from Wuxi Daoxin Technology Co., Ltd. is specifically designed for continuous DO monitoring in industrial wastewater treatment applications. Built with rugged materials and advanced sensing technology, it ensures high-accuracy oxygen measurements in chemically aggressive and high-solid content environments.
The device supports two sensing principles: a fluorescent optical probe, which offers long-term stability without requiring membrane or electrolyte maintenance, and a classic membrane sensor with a replaceable diaphragm for cost-effective operations in stable process conditions. Both options are optimized for accurate readings under challenging industrial conditions.
With a detection range of 0–20 mg/L, a resolution of 0.01 mg/L, and an accuracy of ±1% FS or ±0.1 mg/L, the DX-DO3000 ensures dependable feedback for aeration control systems and compliance reporting. Its response time is ≤10 seconds, making it suitable for dynamic load fluctuation environments.
The device comes standard with automatic temperature compensation (0–80°C), IP-rated enclosure for field conditions, and dual communication outputs: 4-20mA analog and RS485 Modbus RTU digital, ensuring seamless integration with PLCs, DCS, or SCADA systems.
| Measurement Accuracy | ±1% FS Or ±0.1 Mg/L |
| Response Time | ≤ 10s (Seconds) |
| Sensor Lifespan | Fluorescence Method: ≥ 2 Years (no Membrane Loss); Membrane Method: 6 To 12 Months (requires Regular Maintenance) |
| Temperature Compensation Range | 0 ～ 80 ℃ (Automatic Or Manual Compensation) |
| Signal Output | 4-20mA, RS485 (Modbus RTU) |
| Measurement Principle | Luminescent Or Polarographic Membrane (Membrane Method) |
| Flow Velocity | ≥ 0.2 M/s (flow Required For Membrane Method; Still Water Available For Fluorescence Method) |
| Installation | Immersion / Flow-through (Flange Option) |
| Measurement Range | 0-20 Mg/L (Multiple Ranges Optional) |
| Sensor Type | Fluorescence Method: No Membrane, Resistant To Contamination; Membrane Method: Replaceable Diaphragm (electrolyte Required) |
In industrial wastewater treatment plants, particularly in chemical, textile, electroplating, paper, and food processing industries, accurate dissolved oxygen monitoring is essential for aerobic digestion, biological oxidation, and activated sludge control.
The DX-DO3000 plays a crucial role in aeration basin control, helping operators optimize blower energy consumption while maintaining sufficient oxygen levels to support microbial activity. It is also ideal for sequencing batch reactors (SBRs) and MBR (membrane bioreactor) systems, where oxygen levels must be closely managed to ensure stable treatment performance.
Thanks to its corrosion-resistant probe housing (e.g., 316 stainless steel) and anti-fouling design, the analyzer can be installed directly into aeration tanks, return sludge lines, or secondary clarifiers, even where suspended solids and chemical residues pose operational challenges.
In discharge water monitoring, the device ensures that dissolved oxygen levels comply with local environmental discharge regulations, preventing fish kills in receiving water bodies and avoiding penalties due to non-compliance.
For companies operating zero-liquid-discharge (ZLD) or reuse systems, the DX-DO3000 supports quality assurance at each water recovery stage, ensuring that oxygen levels are suitable for reuse in industrial processes or irrigation.
Wuxi Daoxin Technology offers a full range of services to support industrial users, from project consultation to after-sales technical maintenance. We provide onsite guidance or remote support for instrument configuration, communication protocol setup, and integration with industrial control systems.
Clients receive standard calibration kits, detailed Modbus registers, and IO wiring schematics to simplify the initial installation and commissioning process. For membrane probe users, we offer replacement membranes, electrolyte refills, and user-friendly maintenance guides.
In environments with heavy sludge or chemical buildup, we provide optional self-cleaning accessories, such as automated wipers or flushing modules, which significantly reduce manual maintenance frequency.
Our support team can assist in creating multi-point oxygen monitoring networks, combining the DX-DO3000 with other water quality sensors, and feeding real-time data into centralized dashboards for intelligent water management.
We also offer training sessions, either in-person or via video, to empower your operations team with best practices for sensor care, calibration, and data interpretation — helping you ensure regulatory compliance, process efficiency, and environmental responsibility.