Wuxi Daoxin Technology Co., Ltd.
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The DX-DO3000 Online Dissolved Oxygen Meter from Wuxi Daoxin Technology represents a new generation of high-precision industrial DO monitoring solutions. It incorporates cutting-edge luminescent sensor technology, offering fast, stable, and interference-free measurements in real time. Designed for long-term deployment in demanding environments, this instrument eliminates the need for electrolyte replenishment and membrane replacement, making it a highly reliable, low-maintenance device.
Equipped with a wide measurement range of 0–20 mg/L and a resolution as fine as 0.01 mg/L, the DX-DO3000 provides highly sensitive readings suitable for low-oxygen applications such as wastewater aeration basins or fish farming ponds. The system’s accuracy reaches ±1% FS or ±0.1 mg/L, ensuring dependable performance even when oxygen levels fluctuate rapidly.
A major highlight of the DX-DO3000 is its automatic temperature compensation (ATC) system, which adjusts readings based on real-time water temperatures ranging from 0°C to 80°C. This ensures that measurements remain accurate regardless of external conditions. The sensor itself is designed with an anti-fouling optical membrane and is housed in corrosion-resistant 316L stainless steel, making it well-suited for long-term exposure to harsh media.
The system supports dual signal outputs — 4-20mA analog and RS485 digital communication with Modbus RTU protocol — allowing seamless integration with PLCs, DCSs, and remote monitoring systems. It can be powered via either AC 220V or DC 24V, offering installation flexibility.
To accommodate different field setups, the DX-DO3000 supports multiple installation methods, including immersion-type mounting for tanks and flow-through cells for pipeline systems. Flange interfaces are also available, ensuring compatibility with industry-standard mounting points.
| Signal Output | 4-20mA, RS485 (Modbus RTU) |
| Measurement Accuracy | ±1% FS Or ±0.1 Mg/L |
| Operating Temperature | -10 ～ 60 ℃ |
| Temperature Compensation Range | 0 ～ 80 ℃ (Automatic Or Manual Compensation) |
| 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) |
| Measurement Range | 0-20 Mg/L (Multiple Ranges Optional) |
| Alarm Function | Hi/Low Alarm / Relay Output |
| Power Supply | AC 220V ±10%, 50/60Hz Or DC 24V |
| Installation | Immersion / Flow-through (Flange Option) |
The DX-DO3000 is purpose-built for a broad spectrum of industries and scenarios requiring reliable dissolved oxygen monitoring. In municipal wastewater treatment, it plays a central role in optimizing the aeration process, helping reduce energy consumption while ensuring effective biological degradation of pollutants. It can be deployed in SBR, MBBR, and activated sludge tanks.
In aquaculture environments, dissolved oxygen levels are critical for aquatic animal health and survival. The DX-DO3000’s fast response and high precision allow operators to manage pond or tank oxygenation in real time, improving fish yield and feed utilization efficiency.
The device is also highly applicable to pharmaceutical and biotechnology industries, where precise DO control is essential in bioreactors used for fermentation or cell culture. Here, oxygen must be maintained within strict thresholds to support optimal microbial or cellular metabolism.
In environmental monitoring, the DX-DO3000 supports government agencies and researchers in measuring oxygen content in lakes, reservoirs, and rivers. It provides valuable data for assessing ecosystem health and identifying pollution events. Its anti-fouling and maintenance-free design makes it ideal for long-term deployments in remote field stations or autonomous floating platforms.
Furthermore, breweries and beverage producers benefit from the DX-DO3000’s ability to monitor DO levels during fermentation and bottling, where excess oxygen can lead to spoilage or altered taste. The device also finds value in cooling water systems, industrial wastewater recycling, and marine ecosystem studies.
Wuxi Daoxin Technology is committed to delivering not just high-performance instruments but also dependable service throughout the product life cycle. For the DX-DO3000, we offer a complete support package tailored to industrial and environmental users alike.
Our service begins with pre-sales consultation, where our technical specialists help select the most appropriate sensor type — fluorescence or membrane — based on your application and budget. We provide full system documentation, including electrical wiring diagrams, Modbus register maps, and step-by-step calibration procedures.
For commissioning and deployment, our engineers can assist remotely or on-site, depending on customer preference. We also offer calibration services using certified DO standards, ensuring accuracy and traceability in regulated industries.
Post-sale, we maintain an active support team available for troubleshooting via phone, email, or remote desktop. Firmware updates, spare sensor heads, sensor caps, and replacement cables are readily available from our inventory. For membrane-type systems, electrolyte refill kits and diaphragm sets can be shipped on demand.
For customers with harsh site conditions, we provide optional self-cleaning modules and anti-fouling covers, extending maintenance intervals and ensuring uninterrupted operation. Training sessions (online or in-person) are available for your maintenance team to ensure smooth day-to-day handling.