Dissolved Oxygen Monitoring for Aquaculture Water Treatment in Singapore

Importance of Digital Aquaculture

Digital aquaculture transforms traditional farming by deploying IoT sensors, real-time data collection and automatic control systems.

Dissolved oxygen (DO) is the most critical water quality parameter for aquatic organisms.

Low dissolved oxygen will cause slow growth, stress and mass mortality of fish/shrimp. Manual spot-checking can only capture discrete data and fails to respond promptly to oxygen fluctuations, especially during dawn, rainy weather or high-density breeding. Digital monitoring enables 24/7 continuous online measurement, automatic aerator control, early warning of abnormal water conditions, reduced feed waste, lower mortality rate, energy saving and stable farm output. It helps aquaculture operators shift from experience-based farming to data-driven precision farming.

Project Background

A commercial recirculating aquaculture farm adopted Supmea DO-7019-AB10RC fluorescence dissolved oxygen electrodes to build a digital water quality monitoring system for multiple culture ponds. The sensors were submerged in ponds to continuously track dissolved oxygen levels and feed real-time data to the farm’s PLC and cloud platform for automatic aeration control.

Dissolved Oxygen Monitoring for Aquaculture Water Treatment in Singapore

Pain Points Solved

Traditional membrane-type DO electrodes required frequent electrolyte replacement and regular membrane maintenance; they were easily interfered by sulfide and algae in pond water, leading to drifting readings and unstable data.

Manual sampling could not achieve 24-hour continuous monitoring. Sudden DO drop often happened overnight, causing unexpected losses.

Old sensors had analog output, difficult integration with IoT digital control systems; long signal cables brought signal attenuation.

Aquaculture water contains sediment and biofouling; poor corrosion resistance of previous probes shortened service life.

Product Specifications

Product Name: Fluorescence Dissolved Oxygen Electrode Model: DO-7019-AB10RC

Output: RS485 (Modbus RTU)
Power Supply: 12VDC
Cable Length: 10m
Housing Material and Thread Type: Titanium M22×1.5
Measuring Principle: Optical fluorescence, no membrane, no electrolyte
Measurement Range: 0~20 mg/L or 0~200% saturation
Accuracy: ±3%FS
Built-in temperature sensor with automatic temperature compensation
IP68 waterproof, submersible installation

Dissolved Oxygen Monitoring for Aquaculture Water Treatment in Singapore

Application Results & Customer Satisfaction

After installation of SUPMEA DO-7019-AB10RC electrodes, the farm achieved stable, continuous DO monitoring. The fluorescence design eliminates membrane and electrolyte replacement, greatly cutting maintenance workload. The RS485 digital signal supports seamless connection to the farm’s automatic aeration system: aerators turn on/off automatically according to preset DO thresholds.

Aquatic mortality rate decreased significantly; feed utilization improved.
Power consumption of aeration equipment reduced.
Long-term measurement stability is excellent, with minimal data drift under pond water environment.

Customer Feedback:

“The Supmea optical DO probe works reliably in our aquaculture ponds.

The Titanium housing resists corrosion well. The RS485 digital output is easy to integrate with our control system.

Maintenance frequency is much lower than traditional membrane sensors. Real-time DO monitoring helps us avoid oxygen shortage risks effectively.

We are satisfied with the measurement performance and have planned to expand the deployment to more ponds.”