Product Introduction

The KH.SZ-RDO Optical Dissolved Oxygen Sensor is a high-precision online monitoring instrument based on fluorescence quenching technology. Excitation light interacts with the sensor’s fluorescent membrane, and the emitted fluorescence intensity and phase shift change proportionally with dissolved oxygen concentration. Internal calibration algorithms calculate accurate dissolved oxygen values, with automatic temperature and salinity compensation ensuring long-term measurement reliability.

Designed for continuous submersible operation, the KH.SZ-RDO provides stable and fast dissolved oxygen readings without chemical reagents or electrolyte consumption. Its IP68-rated structure supports deployment in rivers, lakes, reservoirs, wastewater treatment plants, aquaculture facilities, and industrial process systems. RS485 Modbus RTU output enables seamless integration with PLC, DCS, SCADA, and industrial IoT monitoring platforms.

Key Features

• Optical Fluorescence Measurement Principle
  Fluorescence quenching technology ensures accurate dissolved oxygen monitoring without chemical reagents or electrode replacement.
• Wide Measurement Range
  Supports dissolved oxygen measurement from 0–20 mg/L or 0–200%, configurable for diverse applications.
• High Accuracy and Repeatability
  Measurement accuracy ±0.3 mg/L with repeatability ≤0.3 mg/L, ensuring reliable long-term monitoring.
• Fast Response Performance
  T90 response time less than 60 seconds, ideal for real-time monitoring.
• Temperature and Salinity Compensation
  Automatic compensation maintains stable readings under varying environmental conditions.
• Low Drift and Long-Term Stability
  Zero drift and range drift within ±0.3 mg/L reduce recalibration and maintenance frequency.
• IP68 Submersible Design
  Waterproof housing supports continuous immersion up to 60 meters in harsh environments.
• Industrial Communication Interface
  RS485 Modbus RTU output allows direct connection to industrial control and monitoring systems.
• Low Maintenance Operation
  Optical measurement avoids electrode fouling, electrolyte loss, and frequent calibration.

Application Scenarios

• Environmental water quality monitoring in rivers, lakes, and reservoirs

• Wastewater treatment plants and industrial effluent monitoring

• Aquaculture and fish farming dissolved oxygen management

• Online dissolved oxygen monitoring in tanks, pipelines, and laboratories

• Industrial process water monitoring in chemical, pharmaceutical, and food production systems

Technical Specifications