1. Product OverviewDissolved Oxygen (DO) Sensor is a specialized device designed exclusively for aquaculture applications by Yosemite Technologies.
• It operates on a non-consumptive principle, eliminating oxygen consumption during measurement and removing flow limitations and electrolyte requirements.
• It features built-in temperature compensation (via an integrated temperature sensor) to maintain measurement accuracy across varying environmental conditions.
• The digital RS485 output enables seamless integration into diverse aquaculture monitoring and control systems.
2. Sensing Technology & Self-Cleaning System• Sensing Technology: Uses the fluorescence method (optical DO sensing), which avoids the traditional electrochemical (Clark electrode) approach. This means:
◦ No oxygen is consumed during measurement, so no flow dependency.
◦ No electrolyte solution is needed, drastically reducing maintenance and extending sensor lifespan.
◦ High resistance to hydrogen sulfide (H₂S) interference, critical for aquaculture environments where organic matter decomposition is common.
• Self-Cleaning System: The datasheet does not explicitly mention a mechanical/chemical self-cleaning mechanism, but the robust 316L/Ti housing and IP68 ingress protection suggest passive resistance to fouling. The optical design inherently avoids membrane clogging issues common in electrochemical sensors.
3. Key Features & Competitive AdvantagesKey Features Competitive Advantages
Digital RS485 + MODBUS protocol Easy integration with industrial IoT and aquaculture control systems; standardized communication for scalability.
No electrolyte / non-consumptive optical design Reduces maintenance costs (no electrolyte refills/replacement); eliminates drift from electrolyte depletion; longer operational life.
Anti-interference (H₂S resistance) Maintains accuracy in high-organic aquaculture environments where H₂S is a common interference.
On-board calibration data storage Plug-and-play installation; no complex on-site calibration required for deployment.
Built-in temperature sensor & compensation Ensures precise DO readings across the 0–50°C temperature range typical of aquaculture ponds/tanks.
IP68 housing (316L/Ti) 30m submersible depth; corrosion resistance to saltwater and aquaculture chemicals; long-term durability in harsh aquatic environments.
Cost-performance optimized for aquaculture Tailored to the specific needs of fish/shrimp farming, avoiding over-engineering for industrial water treatment use cases.
4. Technical Specifications
| Parameter |
Details |
| Model |
INK220 |
| Measurement Principle |
Fluorescence method (optical) |
| Measurement Range |
0–50 mg/L (or 0–500% saturation) |
| Accuracy |
±3% (0–20 mg/L); ±10% (>20 mg/L) |
| Temperature Range |
0–50°C |
| Max Water Depth |
30 m |
| Housing Rating |
IP68 (submersible, dust-tight |
| Interface |
RS-485, MODBUS protocol |
| Power |
0.1 W (DC 6–24 V, current >50 mA) |
| Installation |
M22×1.5 thread (convertible to NPT3/4); immersive |
| Dimensions |
Φ22 mm × 152.7 mm |
| Cable Length |
10 m (default, customizable |
| Calibration |
1-point or 2-point calibration; data stored on-sensor |
| Housing Material |
316L stainless steel / Titanium |
• Primary Application: Commercial aquaculture (fish, shrimp, shellfish farming in ponds, recirculating aquaculture systems (RAS), and hatcheries).
• Secondary Use Cases:
◦ Aquarium and aquatic research facilities.
◦ Water quality monitoring in aquaculture-related water treatment systems.
◦ Integration with IoT-based aquaculture automation platforms for real-time DO monitoring and aeration control.
◦ Coastal aquaculture operations (due to corrosion-resistant 316L/Ti housing).
