Expert in Water Quality Measurement and Water Treatment Project Since 2007
Optical Dissolved Oxygen Sensor - for Irrigation - BOQU
Product Overview
- Model DOG-208F is a ppb‑class polarographic dissolved oxygen sensor from BOQU designed for trace (very low) dissolved oxygen measurement.
- It measures 0–100 µg/L (0–100 ppb) with a detection limit of 0.1 µg/L (20 °C) and is intended for demanding industrial and water‑quality applications where ultra‑low DO monitoring is required.
Product Features
- Polarographic sensor with platinum cathode and Ag/AgCl anode, electrolyte 0.1 M KCl.
- Silicone rubber permeable membrane (imported) combined with steel gauze for mechanical protection.
- Stainless steel 316L electrode shell, double‑shielded 5 m cable, and multiple temperature‑compensation options (PT100, PT1000, etc.).
- Technical highlights: measuring range 0–100 µg/L, detection limit 0.1 µg/L, output current ~50–80 nA (max 20–25 µA), polarization voltage 0.7 V, polarization time >8 h, sensor life ~3 years.
Product Value
- Enables highly sensitive, reliable detection of trace dissolved oxygen (ppb level) for processes where low DO is critical.
- Reduces operational interruptions thanks to long calibration intervals (>60 days) and multi‑year sensor life.
- Improves process control and compliance in industrial and water treatment systems by delivering accurate, low‑drift measurements (drift ~3%/month, measurement error
Product Advantages
- Extremely low detection limit (0.1 µg/L) and high measurement accuracy (
- Robust construction (SS316L, silicone membrane, steel gauze) for mechanical impact resistance, temperature tolerance and shape retention.
- Stable performance in continuous monitoring setups (low drift, double‑shielded cable, temperature compensation options).
- Flexible customization and factory testing (appearance, markings, quality checks) supported by BOQU’s R&D and manufacturing capabilities.
Application Scenarios
- Trace DO monitoring in power plant processes: thermal plants, desalted water systems, boiler feed water.
- Irrigation and agricultural water quality monitoring where low DO affects soil/aquifer and crop health.
- Environmental and industrial water monitoring: wastewater treatment, process water control, and aquaculture systems requiring sensitive DO measurement.
- Laboratory and R&D settings that demand ppb‑level dissolved oxygen analysis.