HFY-DO20 Optical Dissolved Oxygen Sensor
HFY-DO20
Optical (fluorescence quenching) DO sensing pays for itself in weeks on a shrimp farm: no membrane kits, no weekly service, stable readings you can alarm on. The HFY-DO20 is our most reordered sensor.
Key Features
- Optical principle — drift < 1% per year, annual calibration
- 0–20 mg/L / 0–200% saturation, ±0.3 mg/L
- RS485 Modbus-RTU; 4–20 mA option
- Stainless body, bio-fouling resistant cap
Applications
Shrimp & fish farming, hatcheries, RAS systems, aeration control, lake monitoring.
Specifications
| Range | 0–20 mg/L or 0–200% sat. |
|---|---|
| Accuracy | ±0.3 mg/L or ±2% |
| Response | T90 < 45 s |
| Temperature comp | 0–45 °C built-in |
| Output | RS485 Modbus-RTU; 4–20 mA option |
| Housing | 316L SS + POM, IP68 |
| Maintenance | Cap replacement ~12 months |
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