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High Stability Optical Dissolved Oxygen Sensor For Accurate Freshwater Quality Monitoring Using RS485 Communication
The RS485 fluorescence dissolved oxygen sensor is a professional grade water quality instrument designed for stable and accurate dissolved oxygen measurement in freshwater environments. It uses the optical fluorescence quenching principle where oxygen concentration is determined by measuring changes in light phase shift caused by oxygen molecules. This solid state optical method ensures long term stability and eliminates the drift and maintenance associated with traditional electrochemical probes.
The sensor measures dissolved oxygen from zero to twenty milligram per litre corresponding to zero to two hundred percent saturation with high accuracy. Built in automatic temperature compensation improves measurement reliability across varying conditions. Using the ModBus RTU protocol over RS485 the sensor integrates easily into industrial control systems data loggers and monitoring networks. Its fully sealed waterproof construction makes it suitable for continuous deployment in aquaculture wastewater treatment and environmental monitoring applications.
Key Features
- Optical Fluorescence Quenching Technology
Provides stable and accurate dissolved oxygen measurement without consumable parts
- Wide Measurement Range
Measures dissolved oxygen from zero to twenty milligram per litre and zero to two hundred percent saturation
- High Measurement Accuracy
Error within plus minus three percent full scale
- Automatic Temperature Compensation
Ensures reliable readings under changing water temperature conditions
- RS485 With ModBus RTU Protocol
Enables simple and robust integration with industrial and monitoring systems
- Fully Waterproof Construction
Designed for long term submerged operation in freshwater environments
Maintenance-Free Fluorescence Principle
Traditional electrochemical sensors require regular calibration and electrolyte replenishment due to electrode polarization and depletion. This fluorescence dissolved oxygen sensor employs a sophisticated optical approach that does not consume oxygen or rely on electrolytes. This design provides great long-term stability, minimizes maintenance frequency, and lowers total cost of ownership.
Accurate Data with Automatic Temperature Compensation
The concentration of dissolved oxygen in water is largely depending on its temperature. This ModBus DO sensor has a specific temperature sensor that monitors water conditions in real time. It automatically applies temperature adjustment to all measurements, delivering accurate and dependable dissolved oxygen concentration and saturation readings even in changing temperatures.
Seamless System Integration via RS485
The industrial-grade sensor features an RS485 communication interface and supports the ModBus-RTU protocol. This capability enables dependable long-distance data transfer and easy integration into current data platforms, PLCs, data loggers, and other industrial control and monitoring systems. The machine is factory calibrated, but it also enables user-defined zero-oxygen and full-scale calibration via registers for optimization.
Robust Design for Harsh Environments
The dissolved oxygen sensor was designed for long-term field deployment and is built to last. The probe is made of 316 stainless steel, which is very resistant to corrosion. The complete unit is waterproofed to an IP68 standard, allowing it to be immersed continuously and work dependably in harsh freshwater environments such as rivers, lakes, and treatment facilities.
Applications
- Freshwater Aquaculture: To improve stock health, monitor DO levels in fish ponds and tanks.
- Wastewater Treatment: Aeration processes must be controlled to provide efficient biological treatment.
- Environmental monitoring: Install in rivers, lakes, and reservoirs to record long-term water quality data.
- Scientific Research: Collect precise dissolved oxygen data for environmental investigations.
- Smart Agriculture and Hydroponics: Ensure that irrigation and nutrition solutions include enough oxygen levels.
Package Includes:
- RS485 Fluorescence Dissolved Oxygen Sensor (Freshwater) x1
- Sensor cable x1
