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Professional Dissolved Oxygen Sensors & DO Meters Manufacturer
Dongrun is a leading dissolved oxygen sensor manufacturer and DO meter supplier in China. We provide high-precision fluorescence (optical) and polarographic dissolved oxygen sensors for water quality monitoring in aquaculture, wastewater treatment, drinking water, and industrial process applications. With over 20 years of experience, our DO sensors are exported to 70+ countries worldwide.
Why Choose Dongrun DO Sensors?
- Advanced fluorescence measurement technology
- No membrane replacement required
- Low maintenance, stable performance
- ISO 9001 certified manufacturer
- Export to 70+ countries worldwide
- Competitive factory pricing
- Professional technical support
- OEM/ODM services available
Measurement Technology
Fluorescence DO Sensors (Optical)
Optical fluorescence technology measures the quenching effect of oxygen on a fluorescent layer. Advantages: no membrane, no electrolyte, no polarization time, minimal maintenance, long service life (5+ years). Ideal for applications where low maintenance is priority.
Polarographic DO Sensors
Traditional Clark-type polarographic technology with proven reliability. Requires membrane replacement periodically. Suitable for laboratory and standard industrial applications where periodic maintenance is acceptable.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Range | 0-20 mg/L or 0-200% saturation |
| Accuracy | ±0.1 mg/L |
| Resolution | 0.01 mg/L |
| Response Time | ≤30 seconds |
| Operating Temperature | 0-50°C |
| Pressure Range | 0-4 bar |
| Output | 4-20mA, RS485/Modbus |
| Calibration | Single or two-point calibration |
| Power Supply | 12-24VDC |
| Protection | IP68 |
Product Models
| Model | Type | Range | Application |
|---|---|---|---|
| DRDO-100 | Fluorescence | 0-20 mg/L | General use |
| DRDO-200 | Fluorescence | 0-20 mg/L | High precision |
| DRDO-300 | Polarographic | 0-20 mg/L | Laboratory |
| DRDO-400 | Fluorescence | 0-20 mg/L | Compact size |
| DRDO-500 | Fluorescence | 0-50 mg/L | High range |
Applications
- Aquaculture – Fish farms, shrimp ponds, hatcheries
- Municipal Wastewater – Aeration control, treatment monitoring
- Drinking Water
Reservoir monitoring, water quality - Industrial Process
Process water, cooling water - Environmental
River, lake, ocean monitoring - Swimming Pools
Water treatment control - Bioreactors
Fermentation, cell culture - Power Plants
Boiler water treatment
Contact Us
Email: info@dongrun-instrument.com | Phone: +86-769-23028868 | Website: www.dongrun-instrument.com
