Infrared turbidity sensor DTU-800

light scatteringhigh-accuracyModbus RTU

Product Overview
Turbidity Sensor is based on the method of combination of infrared absorption scattered light. Infrared light which the photo source sends out is scattered by suspended particles in the sample. And finally converted to electrical signals by photoelectric detector and getting the turbidity value of the sample after treatment by analog and digital signals. This product is widely used in online monitoring of turbidity of water inlet and sedimentation tank in waterworks and online monitoring in sewage plant, industrial production process and wastewater treatment process.

Measurement Principle
This Turbidity Sensor operates on the combined technology of infrared absorption and scattered light detection. Infrared light emitted by the sensor’s light source is scattered by suspended particles in the sample. This scattered light is then captured by a photoelectric detector, which converts the optical signal into an electrical signal. After undergoing analog-to-digital signal processing, the electrical signal is analyzed to accurately determine the turbidity value of the sample.

Key Features

• Dual-Beam Detection Technology: Adopts dual-beam infrared scattered light photometer technology, ensuring excellent measurement repeatability and long-term stability in various application scenarios.
• ISO7027 Standard Compliance: Follows the ISO7027 standard (infrared light scattering technique), effectively eliminating interference from sample color and guaranteeing accurate turbidity measurements.
• Built-in Self-Diagnosis: Integrated self-diagnosis function continuously verifies data accuracy, minimizing measurement errors and enhancing operational reliability.
• Optional Automatic Cleaning: Available with an integrated cleaning brush for self-cleaning functionality, reducing manual maintenance workload and maintaining consistent performance in harsh or fouling-prone environments.
• Digital Performance Advantages: Equipped with digital sensor technology, offering strong anti-interference capability and supporting long-distance data transmission without signal degradation.
• Seamless System Integration: Standard digital signal output enables direct integration and networking with other equipment (e.g., PLC, SCADA systems), no additional controller required.
• Plug-and-Play Installation: Designed for quick and hassle-free on-site deployment, reducing installation time and labor costs.

Applications

• Water Treatment Plants: Real-time online turbidity monitoring of raw water inlets, sedimentation basins, filtration units, and finished water outlets.
• Sewage & Industrial Wastewater Treatment: Online turbidity monitoring in sewage treatment plants, industrial process water systems, and wastewater treatment processes (e.g., chemical, textile, food & beverage, pharmaceutical industries) to ensure process control and compliance with discharge standards.

Specifications
Specifications
Details
Measurement Range
0.01-100 NTU, 0.01-4000 NTU
Measurement Accuracy
Less than ±2% of the measured value or ±0.1NTU, maximax criterion
Repeatability
±2%
Resolution
0.01NTU~0.1NTU, Depend on the measuring range
Pressure Range
≤0.4Mpa
Flow velocity
≤2.5m/s, 8.2ft/s
Material
Main Body: SUS316L (Ordinary version), Titanium alloy (Seawater version); Cable: PUR
Power Supply
9~36VDC
Communication Protocol
MODBUS RS485
Operating Temperature
0~45℃ (not freeze)
Storage Temperature
-15~50℃
Weight
1.65KG
Level of Protection
IP68/NEMA6P
Cable Length
Standard: 10 m, the maximum can be extended 100m

Technical Characteristics / Specifications

• Model: DTU-800
• Measurement Range: 0.01-100 NTU, 0.01-4000 NTU
• Accuracy: Less than ±2% of measured value or ±0.1NTU
• Repeatability: ±2%
• Resolution: 0.01NTU~0.1NTU (depending on range)
• Pressure Range: ≤0.4Mpa
• Flow velocity: ≤2.5m/s (8.2ft/s)
• Main Body Material: SUS316L (Ordinary), Titanium alloy (Seawater)
• Cable Material: PUR
• Power Supply: 9~36VDC
• Communication: MODBUS RS485
• Operating Temperature: 0~45℃ (not freeze)
• Storage Temperature: -15~50℃
• Weight: 1.65KG
• Protection: IP68/NEMA6P
• Cable Length: Standard 10m, max 100m