Water Quality Sensors for Aquaculture Scenarios

1. Recirculating Aquaculture Systems (RAS)

Core Challenges: Rapid toxin accumulation (ammonia/nitrite), dissolved oxygen (DO) fluctuation, high energy costs.

Critical Parameters & Ranges

Sensor Package

• Essential:

• Multi-parameter probe (DO/pH/ammonia/temperature, ±0.1°C accuracy)

• Turbidity sensor (0-1000 NTU range, ±2% precision)

• ORP sensor (>250 mV for organic load warning)

• Optional: Nitrate sensor (eutrophication prevention)

System Integration

• Mechanical filtration: Drum filter (>90% solids removal)

• Biofiltration: MBBR media + ozone generator (95% ammonia conversion)

Value Proposition: Expect to be 30% mortality reduction + 25% energy savings through automated toxin control.

2. Pond Culture

Core Challenges: Algal blooms, diurnal DO swings (>4 mg/L fluctuation), post-rain turbidity.

Critical Parameters

Sensor Package

• Optical DO sensor (anti-algae coating, ±0.2 mg/L)

• pH electrode (salt-resistant, ±0.1 accuracy)

• Infrared turbidimeter (storm-proof operation)

Solution: Around 15% better FCR + 60% fewer algal blooms via real-time DO/pH stabilization.

3. Net Pen Farming

Core Challenges: Vertical DO stratification, disease transmission, biofouling.

Critical Parameters

Sensor Package

• Depth-stratified DO sensors (surface/mid/bottom)

• Self-cleaning conductivity sensor (±1% accuracy)

Value: Around 40% more uniform oxygenation + 35% lower disease incidence.

4. Cold-Water Fish Farming

Core Challenges: Thermal stress (>18°C), slow nitrification at low temps.

Critical Parameters

Sensor Package

• Cryogenic DO sensor (no electrolyte freezing)

• Ammonia/nitrate duplex probe

Outcome: About 25% higher winter survival with ±0.3°C precision.

5. Ornamental Fish Culture

Core Challenges: Chlorine poisoning, chloride imbalance.

Critical Parameters

Sensor Package

• Electrochemical chlorine sensor (0.01 mg/L detection)

• Ion-selective chloride electrode

Result: Around 90% mortality reduction in high-value species.

6. Hatchery Operations

Core Challenges: Larval stress, imprecise feeding.

Critical Parameters

Sensor Package

• Micro-scale DO sensor (±0.1 mg/L)

• Temperature-compensated salinometer

Benefit: Around 85% survival rate + 30% feed cost savings.