NBL-NON-406-A Online Nitrate Nitrogen Sensor: Industrial-grade Online Nitrate Nitrogen Monitoring Equipment

NBL-NON-406-A Online Nitrate Nitrogen Sensor

Nitrate nitrogen monitoring often faces problems such as short electrode life, large temperature drift, easily damaged membrane heads, and signal interference, resulting in unstable data, high maintenance costs, and increased system integration difficulty. The NiuBoL NBL-NON-406-A online nitrate nitrogen sensor adopts a patented nitrate ion selective electrode and a stable reference system, effectively solving these industry pain points and providing system integrators and engineering contractors with a highly stable, high-precision, and easy-to-integrate integrated online nitrate nitrogen monitoring solution.

NBL-NON-406-A Online Nitrate Nitrogen Sensor Core Advantages

• Patented Stable Reference System: The internal reference liquid slowly seeps out under 100 KPa pressure, significantly extending the reference electrode life and making long-term measurement more reliable.

• Replaceable Membrane Head Design: Reduces long-term usage costs and makes maintenance convenient.

• Digital Integration and Temperature Compensation: RS-485 Modbus RTU protocol supports seamless connection to PLC, DCS, and SCADA systems. Pt1000 automatic temperature compensation ensures accuracy.

NBL-NON-406-A Online Nitrate Nitrogen Sensor Product Overview

The NiuBoL NBL-NON-406-A integrated online nitrate nitrogen sensor is designed based on the PVC membrane nitrate ion selective electrode method and is specially used for fast and accurate measurement of nitrate nitrogen (NO3--N) content in water. The sensor has a built-in automatic temperature compensation function, which can effectively eliminate the influence of temperature changes on measurement results and ensure that the data maintains high accuracy under different working conditions.

The product offers two standard ranges: 0～100.00 mg/L and 0～1000.0 mg/L, with fine resolution, suitable for various application scenarios from low-concentration surface water to high-concentration industrial wastewater. It adopts RS-485 bus and standard Modbus RTU communication protocol, which can be directly connected to PLC, DCS, industrial control computers, touch screens and other third-party equipment to achieve seamless data transmission and remote monitoring. Optional 4-20mA current output further enhances system compatibility.

The sensor design focuses on long-term stability. The patented nitrate ion probe combined with the microporous salt bridge reference system enables the electrode to maintain reliable performance in complex water bodies. The replaceable membrane head design significantly reduces consumable costs. The IP68 protection rating combined with the 3/4 NPT standard installation interface makes it particularly suitable for long-term online monitoring in scenarios such as wastewater treatment plants, river and lake water bodies, and industrial denitrification systems, significantly reducing manual maintenance costs and system integration complexity.

NBL-NON-406-A Online Nitrate Nitrogen Sensor Core Technical Advantages

• Patented Ion Selective Electrode Technology: Adopts a dedicated PVC membrane nitrate ion selective electrode. The internal reference liquid seeps out extremely slowly under a pressure of at least 100 KPa, forming a stable reference system, effectively extending electrode service life, reducing drift, and improving long-term measurement reliability.

• Replaceable Membrane Head: Modular membrane head design. When the service life expires, only the membrane head needs to be replaced, without replacing the entire sensor, greatly reducing long-term operation and maintenance costs.

• Automatic Temperature Compensation: Integrated Pt1000 temperature sensor performs real-time automatic compensation to ensure measurement accuracy is not affected by temperature fluctuations within the 0～40℃ operating temperature range.

• Digital Communication and Anti-interference: Standard RS-485 Modbus RTU protocol uses shielded cable transmission, effectively resisting electromagnetic interference in industrial sites, supporting long-distance and multi-node networking, and making integration convenient.

• High Protection Rating Design: The whole machine reaches IP68 protection rating and can work long-term submerged underwater (working pressure <0.1 MPa). The wetted materials are PVC and POM, with good corrosion resistance.

• Convenient Installation and Maintenance: 3/4 NPT pipe thread interface supports submerged or pipe/tank installation. The installation angle must be tilted at least 15° or more. Inverted or horizontal installation is not allowed. The two-point calibration method is easy to operate, and the electrode activation process is clear.

These technical features make the NBL-NON-406-A the preferred device for building nitrate nitrogen online monitoring systems, ensuring data continuity and accuracy while reducing engineering implementation and later operation and maintenance costs.

NBL-NON-406-A Online Nitrate Nitrogen Sensor Technical Specifications

NBL-NON-406-A Online Nitrate Nitrogen Sensor Application Scenarios

1. Municipal Wastewater Treatment Plants: Real-time monitoring of nitrate nitrogen concentration in inlet and outlet water to optimize denitrification process and ensure total nitrogen compliance with discharge standards.

2. Industrial Wastewater Denitrification Systems: Online nitrate nitrogen monitoring for nitrate-containing wastewater in chemical, food, pharmaceutical and other industries to support process adjustment and efficiency evaluation.

3. River, Lake and Surface Water Environmental Monitoring: Submerged installation at monitoring sections to achieve continuous online collection of nitrate nitrogen, assisting in water eutrophication assessment and pollution tracing.

4. Agricultural Irrigation and Groundwater Monitoring: Monitoring nitrate content in farmland drainage or groundwater to prevent and control agricultural non-point source pollution and ensure water resource safety.

5. Drinking Water Source Monitoring: Timely detection of nitrate exceedance risks to protect drinking water safety.

Wiring and Installation Instructions

During installation, the sensor must not be installed inverted or horizontally and must be tilted at least 15° or more. It supports submerged installation and can also be used in pipelines or tanks (side wall installation is recommended with a dedicated mounting base). The installation location should avoid direct impact from strong water flow.

Electrical Connection Wire Sequence Definition:

• Red wire → Power positive (12～24VDC)

• Black wire → Ground (GND)

• Blue wire → 485A

• White wire → 485B

• Yellow wire → 4-20mA current output (optional, leave floating if not in use)

Before powering on, please carefully check the wire sequence. All wiring points must undergo strict waterproof sealing treatment, and corrosion-resistant cables should be selected to adapt to long-term underwater or humid environments.

FAQ

Q1: What range options does the NBL-NON-406-A support?

A: The sensor provides two ranges: 0～100.00 mg/L and 0～1000.0 mg/L, which can be flexibly selected according to actual water quality concentration to ensure measurement accuracy.

Q2: What are the advantages of the replaceable membrane head design?

A: The modular membrane head design means that when the service life expires, only the membrane head needs to be replaced, without replacing the entire probe, greatly reducing long-term usage costs and maintenance difficulty.

Q3: How does the patented reference system help electrode life?

A: The internal reference liquid slowly seeps out under 100 KPa pressure, forming a stable reference environment, significantly extending electrode service life and reducing measurement drift.

Q4: How to calibrate the sensor?

A: Two-point calibration (zero point calibration + slope calibration) is used. The sensor is calibrated before leaving the factory. It is recommended to perform calibration only when the error exceeds the range, using the matching standard solution.

Q5: Is the RS485 Modbus protocol convenient for system integration?

A: The product strictly follows the Modbus RTU standard and can be directly connected to PLC, DCS, touch screens or IoT platforms. It supports multi-node networking and has strong anti-interference capability.

Q6: Does the electrode need activation before use?

A: Yes. Before use, the electrode tip must be immersed in tap water for 24 hours for activation. When not in use for a long time, keep it dry for storage and place the sensing element in the protection bottle.

Q7: What are the requirements for the sensor installation angle?

A: During installation, it must be tilted more than 15°. Inverted or horizontal placement is not allowed to ensure normal seepage of the reference liquid and measurement accuracy.

Q8: What is the product warranty period?

A: One-year warranty service is provided from the date of sale (excluding man-made damage). The membrane head is a consumable item and it is recommended to check and replace it regularly according to actual usage conditions.

Summary and Cooperation Invitation

The NiuBoL NBL-NON-406-A online nitrate nitrogen sensor provides a professional and stable engineering solution for online nitrate nitrogen monitoring with its patented stable reference electrode, replaceable membrane head design, automatic temperature compensation and reliable RS485 Modbus integration solution. It helps system integrators and engineering contractors achieve accurate and continuous nitrate nitrogen data collection in wastewater treatment, environmental monitoring and industrial denitrification projects, reducing maintenance costs and improving system reliability.

If you are planning a nitrate nitrogen monitoring system or need technical selection support for specific water quality conditions, please feel free to contact the NiuBoL professional team. We will provide detailed product configuration suggestions, installation and commissioning guidance, and long-term stable supply assurance to jointly promote the implementation of more efficient and reliable water quality monitoring applications.

NiuBoL NBL-NON-406-A online nitrate nitrogen sensor Data Sheet

NBL-NON-406-A online nitrate nitrogen sensor.pdf