Wuxi Daoxin Technology Co., Ltd.
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The DX-DO3000 Online Dissolved Oxygen Meter by Wuxi Daoxin Technology is a professional-grade instrument tailored for precision biological process control, especially in industries such as pharmaceuticals, biotechnology, and food fermentation. It supports both fluorescent optical and membrane-type sensing technologies, giving users the flexibility to match sensor type with specific process demands.
For pharmaceutical fermentation and bioreactor control, the device delivers exceptional accuracy — ±1% FS or ±0.1 mg/L — along with a fast response time (≤10s), ensuring real-time feedback critical for oxygen-sensitive microbial or cell cultures. Its high resolution of 0.01 mg/L allows precise monitoring during delicate metabolic transitions or oxygen-limited growth phases.
Temperature plays a key role in bioprocessing. The DX-DO3000 is equipped with automatic temperature compensation (ATC), covering 0–80°C, ensuring that DO readings remain accurate regardless of thermal fluctuation in the bioreactor environment. In addition, it operates smoothly under ambient temperatures from -10°C to 60°C, making it suitable for both laboratory and industrial plant settings.
The system provides both analog (4-20mA) and digital RS485 (Modbus RTU) output signals, enabling seamless integration into SCADA systems, PLCs, or fermentation control platforms. The user may choose between AC220V or DC24V power input, adding further flexibility to system design.
Multiple installation options — immersion into bioreactors, flow-through for pipeline samples, or flange-mounts for CIP/SIP environments — make the DX-DO3000 versatile and compatible with standard process engineering protocols.
| Alarm Function | Hi/Low Alarm / Relay Output |
| Installation | Immersion / Flow-through (Flange Option) |
| Measurement Principle | Luminescent Or Polarographic Membrane (Membrane Method) |
| Temperature Compensation Range | 0 ～ 80 ℃ (Automatic Or Manual Compensation) |
| Measurement Range | 0-20 Mg/L (Multiple Ranges Optional) |
| Power Supply | AC 220V ±10%, 50/60Hz Or DC 24V |
| Resolution | 0.01 Mg/L |
| Sensor Lifespan | Fluorescence Method: ≥ 2 Years (no Membrane Loss); Membrane Method: 6 To 12 Months (requires Regular Maintenance) |
| Sensor Type | Fluorescence Method: No Membrane, Resistant To Contamination; Membrane Method: Replaceable Diaphragm (electrolyte Required) |
| Operating Temperature | -10 ～ 60 ℃ |
The DX-DO3000 excels in fermentation-based production systems, where real-time dissolved oxygen monitoring directly influences product yield, cell viability, and quality control. In pharmaceutical manufacturing, it is commonly used in antibiotic, enzyme, and vaccine production, helping maintain optimal DO levels during aerobic fermentation stages.
In biotech labs and pilot-scale fermenters, the device’s membrane-type electrode offers a familiar measurement principle with well-documented response behaviors. For production-scale fermentation, the optical luminescence sensor provides long-term stability, zero drift, and maintenance-free operation, reducing downtime and risk of contamination.
Beyond fermentation, the DX-DO3000 is used in food and beverage industries, such as beer brewing, dairy fermentation, and probiotic culture growth. Maintaining appropriate DO levels during yeast propagation or lactic acid fermentation is essential for ensuring taste, shelf-life, and microbial activity.
The analyzer also supports biological wastewater treatment systems within pharmaceutical plants, where oxygen control affects the performance of microbial consortia used in effluent treatment. Combined with aeration control systems, the DX-DO3000 enhances process efficiency and environmental compliance.
Whether in lab-scale bioreactors, cleanroom-controlled fermentation lines, or GMP-compliant production zones, the DX-DO3000 delivers dependable and accurate dissolved oxygen data across critical process steps.
Wuxi Daoxin Technology provides specialized services tailored to bioprocess control and pharmaceutical compliance. From product selection to validation, we help users integrate the DX-DO3000 into highly regulated environments.
Pre-sales consultation includes sensor type selection, compliance advice for sterile processing, and recommendations for CIP/SIP-compatible probe assemblies. Our team supplies detailed IQ/OQ documentation, 3D drawings, and process integration checklists.
During installation, our engineers provide remote or on-site support, helping calibrate the DO probe using certified reference standards. For membrane-type probes, we provide spare diaphragms, electrolyte solution, and detailed replacement instructions.
Our post-sale services include annual performance validation, sensor health checks, firmware updates, and Modbus integration assistance. We also offer remote diagnostics and routine maintenance planning for continuous uptime in validated production environments.
For clients in regulated industries, we help establish traceable calibration procedures, and issue certificates upon request. Whether you’re scaling a new drug production line or managing DO in a precision bioreactor, our support ensures your monitoring system remains audit-ready and process-optimized.