Product Introduction

The KH.SZ-RDO Optical Dissolved Oxygen (DO) Sensor is a high-precision online water quality monitoring sensor designed for continuous dissolved oxygen measurement in rivers, lakes, reservoirs, and freshwater environmental systems.

Using advanced fluorescence quenching technology, the sensor measures dissolved oxygen concentration without chemical reagents or traditional electrode replacement, providing stable and reliable long-term operation with reduced maintenance requirements.

With automatic temperature and salinity compensation, the KH.SZ-RDO maintains accurate DO measurement under changing environmental conditions. The IP68 submersible design supports long-term underwater deployment, while RS485 Modbus RTU communication enables seamless integration with telemetry systems, SCADA platforms, and IoT-based water quality monitoring networks.

The sensor is widely used in:

• River and lake water quality monitoring
• Reservoir ecological observation
• Hydrological monitoring stations
• Environmental research projects
• Smart water management systems
• IoT water quality monitoring platforms

By providing continuous dissolved oxygen data, the KH.SZ-RDO helps users evaluate aquatic conditions, support ecological protection, and improve water resource management.

How It Works

The KH.SZ-RDO uses fluorescence quenching technology to measure dissolved oxygen concentration.

A fluorescent sensing layer reacts with oxygen molecules in water, and the change in fluorescence characteristics is analyzed to calculate DO concentration.

This optical measurement principle provides:

• No chemical reagent consumption
• No frequent electrode replacement
• Reduced biofouling impact
• Long-term stable dissolved oxygen monitoring

Key Features

Optical Fluorescence Dissolved Oxygen Measurement

Advanced fluorescence quenching technology provides accurate DO measurement without chemical reagents or traditional electrode maintenance.

High-Accuracy Dissolved Oxygen Monitoring

The sensor provides reliable dissolved oxygen measurement for professional water quality assessment and environmental monitoring applications.

Automatic Temperature and Salinity Compensation

Built-in compensation technology maintains measurement stability under changing conditions in:

• Rivers
• Lakes
• Reservoirs
• Natural water environments

Wide Measurement Range Capability

Supports flexible dissolved oxygen measurement ranges for different environmental monitoring requirements.

Fast Response Performance

Rapid response enables real-time observation of changing dissolved oxygen conditions in water systems.

IP68 Submersible Design

The waterproof structure supports long-term underwater deployment in harsh field environments.

Low Maintenance Operation

Optical measurement technology reduces:

• Electrode replacement requirements
• Chemical maintenance costs
• Measurement instability caused by electrode fouling

IoT and SCADA Integration Ready

Supports RS485 Modbus RTU communication for connection with:

• Telemetry stations
• Data loggers
• SCADA systems
• Cloud monitoring platforms
• Smart water management networks

Application Scenarios

Rivers, Lakes and Reservoir Water Quality Monitoring

Provides continuous dissolved oxygen data for aquatic ecosystem assessment, environmental protection, and water quality analysis.

Hydrological Monitoring Stations

Integrated into automated monitoring networks for remote DO data acquisition and environmental observation.

Reservoir and Aquaculture Environmental Management

Supports dissolved oxygen monitoring for water resource management and ecological studies.

Environmental Research Projects

Used for long-term water quality analysis, ecological monitoring, and scientific research.

Smart Water IoT Monitoring Networks

Integrated with telemetry systems and cloud platforms for centralized water quality monitoring and data management.

Technical Specifications