Fluorescence Method Technology Replaces Traditional Electrode Method, Maintenance-Free Period Reaches 12 Months, Providing More Reliable Solutions for Water Quality Monitoring
I. Industry Background: Importance and Challenges of Dissolved Oxygen Monitoring
Dissolved oxygen is a key indicator for measuring water quality health, directly affecting aquatic organism survival and water self-purification capacity. Traditional dissolved oxygen monitoring faces many challenges:
- Frequent maintenance: Electrode method requires regular replacement of electrolyte and membrane
- Unstable accuracy: Susceptible to water flow and chemical interference
- Slow response speed: Traditional electrode method requires 2-3 minutes response time
- Complex calibration: Requires field calibration with cumbersome operation
In 2023, an aquaculture enterprise suffered massive fish mortality due to dissolved oxygen monitoring data deviation, causing direct economic losses exceeding one million yuan, highlighting the industry’s urgent need for highly reliable monitoring equipment.
II. Technological Innovation: Breakthroughs in Optical Dissolved Oxygen Sensors
1. Fluorescence Measurement Principle
- Fluorescence quenching technology
- Measurement accuracy: ±0.1mg/L (0-20mg/L range)
- Detection limit: 0.01mg/L
- Response time: <30 seconds
2. Intelligent Function Design
- Self-cleaning system
- Automatic brushing of optical window prevents biofouling
- Anti-pollution design adapts to high turbidity water
- Maintenance cycle extended to 12 months
3. Environmental Adaptability
- Wide range working conditions
- Temperature: -5℃ to 50℃
- Depth: 0-100 meters (200 meters optional)
- Corrosion-resistant housing, IP68 protection rating
III. Application Practice: Success Cases in Multiple Fields
1. Aquaculture Monitoring
Case study from a large aquaculture base:
- Deployment scale: 36 optical dissolved oxygen sensors
- Monitoring points: Breeding ponds, water inlets, drainage outlets
- Implementation results:
- Dissolved oxygen warning accuracy improved to 99.2%
- Fish mortality reduced by 65%
- Feed utilization rate increased by 25%
2. Wastewater Treatment Monitoring
Application case in an urban wastewater treatment plant:
- Deployment situation: Key process points including aerobic tanks and aeration tanks
- Operational results:
- Aeration energy consumption reduced by 30%
- Effluent water quality compliance rate reached 100%
- Maintenance costs reduced by 70%
3. Surface Water Monitoring
Upgrade of a provincial environmental monitoring network:
- Deployment scope: 32 key monitoring sections
- Implementation results:
- Data validity rate increased from 85% to 99.5%
- Warning response time shortened to 15 minutes
- Field workload for maintenance personnel reduced by 80%
IV. Detailed Technical Advantages
1. Accuracy and Stability
- Long-term stability: <1% signal attenuation/year
- Temperature compensation: Automatic temperature compensation, accuracy ±0.5℃
- Anti-interference capability: Unaffected by flow velocity, pH value, salinity
2. Intelligent Functions
- Remote calibration: Supports remote parameter setting and calibration
- Fault diagnosis: Real-time monitoring of sensor status
- Data storage: Built-in memory supports offline operation
3. Communication and Integration
- Multi-protocol support: MODBUS, SDI-12, 4-20mA
- Wireless transmission: 4G/NB-IoT optional
- Cloud platform integration: Supports mainstream IoT platforms
V. Certification and Standards
1. Authoritative Certification
- National Environmental Protection Product Certification
- Pattern Approval Certificate for Measuring Instruments
- CE, RoHS international certification
2. Standards Compliance
- Complies with HJ 506-2009 water quality dissolved oxygen monitoring standard
- Meets ISO 5814 international standard requirements
- ISO9001 quality management system certification
Conclusion
The successful development and application of optical dissolved oxygen sensors marks an important technological breakthrough in China’s water quality monitoring field. Its characteristics of high accuracy, long service life, and maintenance-free operation provide more reliable technical support for aquaculture, wastewater treatment, environmental monitoring, and other fields, helping China’s water environment management reach new levels.
We can also provide a variety of solutions for
1. Handheld meter for multi-parameter water quality
2. Floating Buoy system for multi-parameter water quality
3. Automatic cleaning brush for multi-parameter water sensor
4. Complete set of servers and software wireless module, supports RS485 GPRS /4g/WIFI/LORA/LORAWAN
For more water sensor information,
please contact Honde Technology Co., LTD.
Email: info@hondetech.com
Company website: www.hondetechco.com
Tel: +86-15210548582
Post time: Nov-18-2025