UV water quality sensor DUVNO3-900

nitrate levelindustrialfor environmental analysis

Product Overview
The Industrial Online Nitrate Nitrogen Sensor Probe is a high-performance water quality monitoring instrument designed for continuous detection of dissolved nitrate (NO₃⁻) concentration in water. Equipped with RS485 communication interface (Modbus protocol), it supports seamless integration with industrial control systems and IoT platforms, making it ideal for drinking water, surface water, industrial process water, and wastewater treatment applications. With its reagent-free design and robust protection features, the sensor ensures reliable, low-maintenance operation in diverse industrial and environmental scenarios.

Key Features

• Direct Immersion Spectrometer Design: Adopts spectrometer-based detection technology for direct immersion measurement, eliminating the need for sampling, pre-processing, or complex sample delivery systems—simplifying on-site deployment.
• Reagent-Free & Eco-Friendly: No chemical reagents required, avoiding secondary pollution and reducing long-term operational costs.
• Rapid Continuous Monitoring: Short response time enables 24/7 real-time data acquisition, capturing dynamic changes in nitrate concentration promptly for process control.
• Automated Maintenance: Integrated automatic cleaning function minimizes manual maintenance workload, ensuring consistent measurement accuracy and extending sensor service life.
• Robust Protection Mechanisms: Features reverse polarity protection for the power supply and protection against incorrect wiring (RS485 A/B terminals connected to power), enhancing operational safety and sensor durability.
• Flexible Connectivity: Supports RS485 (Modbus protocol) for wired integration and offers an optional wireless data transmission module for remote monitoring and system expansion.

Applications

• Water Quality Monitoring: Continuous detection of dissolved nitrate concentration in drinking water, surface water (lakes, rivers, reservoirs), and industrial production process water.
• Wastewater Treatment: Specialized for monitoring nitrate levels in sewage aeration tanks, supporting precise control of denitrification processes to ensure compliance with nitrogen discharge standards.
• Environmental & Industrial Scenarios: Suitable for municipal wastewater treatment plants, chemical, pharmaceutical, food & beverage, and agricultural wastewater monitoring, as well as ecological water quality assessment.

Specifications
Specifications
Details
Measurement Range
0.1-100.0mg/L (1mm)
Measurement Accuracy
±5% or 1mg/L, maximax criterion
Repeatability
±2%
Resolution Ratio
0.01 mg/L
Pressure Range
≤0.4Mpa
Material
Main Body: SUS316L (Ordinary Version), Titanium Alloy (Seawater Version)
Upper and Lower Cover: PUR
Power Supply
Direct current supply: 9~36VDC
Communication Protocol
MODBUS RS485
Storage Temperature
-15 ~ 50℃
Operating Temperature
0 ~ 45℃ (not freeze)
Weight
3.2KG
Level of Protection
IP68/NEMA6P
Cable Length
10-meter standard cable which can be extended up to 100 meters.

Technical Characteristics / Specifications

• Model: DUVNO3-900
• Measurement Range: 0.1-100.0mg/L (1mm)
• Measurement Accuracy: ±5% or 1mg/L, maximax criterion
• Repeatability: ±2%
• Resolution Ratio: 0.01 mg/L
• Pressure Range: ≤0.4Mpa
• Main Body Material: SUS316L (Ordinary Version), Titanium Alloy (Seawater Version)
• Upper and Lower Cover Material: PUR
• Power Supply: 9~36VDC
• Communication Protocol: MODBUS RS485
• Storage Temperature: -15 ~ 50℃
• Operating Temperature: 0 ~ 45℃ (not freeze)
• Weight: 3.2KG
• Level of Protection: IP68/NEMA6P
• Cable Length: 10-meter standard cable, extendable up to 100 meters