The fluorescence-based dissolved oxygen sensor operates on the principle of fluorescence quenching to detect dissolved oxygen in water. It requires no electrolyte and no consumables, resulting in low maintenance costs over long-term use. Equipped with an NTC10K temperature compensation element, it automatically eliminates measurement deviations caused by temperature changes, ensuring stable and accurate data.

With digital RS485 MODBUS RTU output, it can be directly connected to PLCs and online water quality monitoring devices. The entire probe is made of 316L stainless steel, offering excellent corrosion resistance. The measuring section is rated IP68, supporting long-term submerged online monitoring. It is widely used for real-time dissolved oxygen measurement in natural water bodies, water supply systems, and wastewater treatment.

Technical Specifications

Parameter	Specification
Model	AG4761CD-135
Power	5~40VDC, ≤0.3W
Output	RS485 MODBUS RTU
Principle	Fluorescence
Shell Material	316L Stainless Steel
Waterproof Rating	IP68
Measurement Range	0-20mg/L, 0-200%
Accuracy	±1% F.S
Pressure Rating	≤0.1Mpa
Temperature Range	0-50℃
Temperature Compensation	NTC10K
Calibration	Oxygen free water calibration, air calibration
Connection	4 cores
Cable Length	Standard 10 meters
Thread	PG13.5
Applications	Rivers, lakes, drinking water, environmental protection, etc.

Key Features

Fluorescence-based measurement principle - no electrolytes or consumables required
Wide voltage input range (5-40VDC) with low power consumption
Built-in NTC10K temperature compensation for accurate readings
Digital RS485 MODBUS RTU output for easy integration
316L stainless steel construction for excellent corrosion resistance
IP68 waterproof rating for long-term submerged operation
Low maintenance design with long service life

Tags:

Online Water Quality Monitor

Multi Parameter Water Quality Monitor

PH ORP Meter

Conductivity Meter

Dissolved Oxygen Meter

Ion-selective Meter

Residual Chlorine Meter

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

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PH ORP Meter

PH ORP Transmitter And Sensor

Portable PH ORP Meter

Desktop PH ORP Meter

Conductivity Meter

Conductivity Transmitter And Sensor

Portable Conductivity Meter

Desktop Conductivity Meter

Dissolved Oxygen Meter

Dissolved Oxygen Transmitter And Sensor

Portable Dissolved Oxygen Meter

Desktop Dissolved Oxygen Meter

Ion-selective Meter

Fluoride Analyzer

Chloride Analyzer

Calcium Analyzer

Ammonia Nitrogen Analyzer

Nitrate Nitrogen Analyzer

Residual Chlorine Meter

Disinfectant Water Monitoring

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

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Sludge Interface Meter

Water Quality Monitoring Accessories

products details

PG13.5 5-40V Wide Voltage RS485 Digital Fluorescence Dissolved Oxygen Sensor with 316L Stainless Steel

Online Water Quality Monitor

Multi Parameter Water Quality Monitor

PH ORP Meter

Conductivity Meter

Dissolved Oxygen Meter

Ion-selective Meter

Residual Chlorine Meter

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

Water Quality Monitoring Accessories

Online Water Quality Monitor

Drinking Water Monitoring

Industrial Wastewater Monitoring

Aquaculture water Quality Monitoring

Boiler Water Monitoring

Multi Parameter Water Quality Monitor

PH ORP Meter

PH ORP Transmitter And Sensor

Portable PH ORP Meter

Desktop PH ORP Meter

Conductivity Meter

Conductivity Transmitter And Sensor

Portable Conductivity Meter

Desktop Conductivity Meter

Dissolved Oxygen Meter

Dissolved Oxygen Transmitter And Sensor

Portable Dissolved Oxygen Meter

Desktop Dissolved Oxygen Meter