NBL-NHN-406-A Online Ammonium Nitrogen Sensor: For Wastewater Treatment, River and Lake Monitoring, Industrial Wastewate···

NBL-NHN-406-A Online Ammonium Nitrogen Sensor

Wastewater ammonia nitrogen monitoring often faces problems such as short electrode life, large temperature drift, complex installation and maintenance, and signal interference, resulting in unstable data, frequent maintenance, and increased system integration difficulty. The NiuBoL NBL-NHN-406 online ammonium nitrogen sensor adopts a patented ammonium 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 ammonium nitrogen monitoring solution.

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 stable.

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

• Reliable Protection and Convenient Installation: IP68 protection rating, 3/4 NPT pipe thread interface, suitable for submerged installation, and easy maintenance.

NBL-NHN-406 Online Ammonium Nitrogen Sensor Product Overview

The NiuBoL NBL-NHN-406 integrated online ammonium nitrogen sensor is designed based on the ion selective electrode method and is specially used for fast and accurate measurement of ammonium ion (NH4+-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 housing material options (NHN-406-A: ABS/PVC/POM, NHN-406-S: PVC/316L/POM) to meet the needs of different corrosive environments. 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 ammonium ion electrode combined with the microporous salt bridge reference system enables the electrode to maintain reliable performance in complex water bodies. 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 wastewater, significantly reducing manual maintenance costs and system integration complexity.

NBL-NHN-406 Online Ammonium Nitrogen Sensor Core Technical Advantages

• Patented Ion Selective Electrode Technology: Adopts a dedicated PVC membrane ammonium 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.

• 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 5-core twisted shielded wire 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 M16-5 core waterproof connector ensures reliable connection and adapts to humid and corrosive environments.

• Convenient Installation and Maintenance: 3/4 NPT pipe thread interface supports submerged or tank installation. The installation angle must be tilted at least 15° or more. Inverted or horizontal installation is not allowed. Electrode activation and calibration operations are simple, and the two-point calibration method is convenient for on-site implementation.

• Low Power Consumption Operation: Power consumption is only 0.2W@12V, suitable for continuous online operation and reducing overall system energy consumption.

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

NBL-NHN-406 Online Ammonium Nitrogen Sensor Technical Specifications

NBL-NHN-406 Online Ammonium Nitrogen Sensor Application Scenarios

1. Municipal Wastewater Treatment Plants: Real-time monitoring of ammonia nitrogen concentration in inlet and outlet water to optimize nitrification-denitrification process and ensure effluent quality meets standards.

2. Industrial Wastewater Treatment Systems: Online ammonia nitrogen monitoring for ammonia-containing wastewater in chemical, aquaculture, food processing and other industries to support process adjustment and exceedance early warning.

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

4. Aquaculture Water Quality Management: Monitoring ammonia nitrogen levels in aquaculture water to prevent ammonia nitrogen exceedance from causing toxicity to fish and shrimp and ensure breeding safety.

5. Industrial Circulating Water and Denitrification Systems: Cooperate with denitrification process to provide real-time ammonia nitrogen data feedback and optimize treatment efficiency.

Wiring and Installation Instructions

During installation, the sensor must not be installed inverted or horizontally and must be tilted at least 15° or more. For side wall or pipeline installation, it is recommended to use a dedicated mounting base. The installation location should avoid direct impact from strong water flow. Submerged installation in stable water areas is recommended.

Electrical Connection (5-core twisted shielded cable):

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

• Black wire → Ground (GND)

• Blue wire → 485A

• Green 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-NHN-406 support?

A: The sensor provides three ranges: 0～10 mg/L, 0～100 mg/L, and 0～1000 mg/L. You can select the appropriate model according to actual water quality concentration to ensure measurement accuracy.

Q2: What is the impact of the patented reference system on electrode life?

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

Q3: 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.

Q4: 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, has strong anti-interference capability, and is easy to integrate.

Q5: What are the precautions for sensor installation?

A: During installation, it must be tilted more than 15°. Inverted or horizontal placement is not allowed. It uses a 3/4 NPT interface and supports submerged or tank installation. Side wall installation requires a mounting base.

Q6: Does the electrode need activation before use?

A: Yes. Before use, remove the protection cap, soak in clean water for 2 hours for activation, then rinse with deionized water before testing. When not in use for a long time, store it dry.

Q7: Does the product support 4-20mA output?

A: Yes. Optional 4-20mA current output is available and can be used simultaneously with RS-485 digital output to meet the access requirements of different control systems.

Q8: How is the warranty period defined?

A: The whole machine provides one-year warranty, and the electrode as a consumable item has a six-month warranty. Corresponding after-sales service is provided for non-man-made damage.

Summary and Cooperation Invitation

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

If you are planning an ammonia 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.

NBL-NHN-406-A online ammonium nitrogen sensor Data Sheet

NBL-NHN-406 online ammonium nitrogen sensor.pdf