NBL-MPS-400B Multi-Parameter Self-Cleaning Digital Water Quality Sensor: for Wastewater Treatment, Aquaculture

NBL-MPS-400B Online Multi-Parameter Self-Cleaning Digital Water Quality Sensor

In complex water environments, sensors are susceptible to microbial attachment, dirt accumulation, and signal interference, leading to data drift, frequent maintenance, and increased system integration difficulty. The NiuBoL NBL-MPS-400B online multi-parameter self-cleaning digital sensor solves these industry pain points through integrated design and automatic cleaning technology, providing system integrators and engineering contractors with a reliable, high-precision, and easy-to-integrate online water quality monitoring solution.

Core Advantages

• Automatic Self-Cleaning System: Built-in cleaning brush with configurable cleaning intervals and times, effectively preventing microbial attachment and significantly extending the maintenance cycle.

• High Precision and Anti-Interference Capability: Digital sensor design with RS-485 bus transmission and Modbus RTU protocol supports stable long-distance communication with strong anti-interference performance.

• Multi-Parameter Integrated Measurement: Single probe simultaneously monitors up to 6 parameters (including temperature), with high integration, reducing deployment costs and installation complexity.

NBL-MPS-400B Online Multi-Parameter Self-Cleaning Digital Water Quality Sensor Product Overview

The NiuBoL NBL-MPS-400B online multi-parameter self-cleaning digital sensor adopts an integrated design with a reliable structure and simple operation. The product optionally supports digital sensor modules for dissolved oxygen, pH, ORP, conductivity/salinity, turbidity, etc., and can simultaneously measure up to 6 parameters (including temperature).

The sensor uses an RS-485 bus and standard Modbus/RTU communication protocol, allowing direct connection to data acquisition platforms, PLC, DCS, or IoT gateways for seamless integration. The built-in automatic cleaning device can flexibly set cleaning cycles according to water quality pollution levels, effectively cleaning the sensor surface, reducing biofilm formation, and significantly lowering on-site maintenance frequency and costs.

The probe uses a professional marine-grade connector with excellent waterproof performance, making disassembly and maintenance easy. The front end is equipped with a protective cover with slotted design around it, which blocks large suspended solids and organisms while not affecting measurement accuracy. The protective cover uses copper-containing metal material, combined with the automatic cleaning function, further inhibiting microbial attachment, making it particularly suitable for long-term submerged online monitoring scenarios.

This sensor is widely suitable for industrial and environmental engineering projects with high requirements for real-time, stable, and low-maintenance water quality data, helping system integrators quickly build reliable water environment monitoring systems.

NBL-MPS-400B Online Multi-Parameter Self-Cleaning Digital Water Quality Sensor Core Technical Advantages

• Hardware Material and Protection: The housing combines POM and 316L stainless steel with strong corrosion resistance; the whole machine has IP68 protection rating and can work long-term submerged underwater (working pressure ≤0.2MPa). The marine-grade connector and shielded cable design ensure stable signal transmission in humid and corrosive environments.

• Automatic Cleaning Technology: Equipped with a dedicated cleaning brush that supports remote or timed automatic cleaning, effectively removing dirt and biofilm from the sensor surface, avoiding frequent downtime and labor consumption caused by traditional manual cleaning. Cleaning parameters can be flexibly configured to adapt to different water quality environments from clean rivers to highly polluted sewage.

• Digital Signal Processing and Anti-Interference: Full digital sensor architecture with built-in high-performance signal processing algorithms reduces the problem of analog signals being easily interfered with. The RS-485 bus supports multi-node networking with long communication distance and outstanding anti-electromagnetic interference capability, suitable for complex industrial sites.

• Measurement Stability Optimization: Each parameter sensor undergoes strict calibration and aging tests, with precise temperature compensation algorithms and small long-term drift. It maintains reliable measurement accuracy even in environments with large temperature fluctuations.

• Integration and Scalability: The integrated structure reduces wiring and installation points and supports flexible combination of multiple sensor modules, making it convenient to configure parameters according to project requirements. All calibration parameters are stored inside the sensor, so there is no need to reconfigure the host computer when replacing or maintaining.

Main Optional Sensor Parameters

Other Technical Parameters

The cable uses 4-core shielded twisted pair with clear wiring sequence: red wire (12VDC positive), black wire (GND), blue wire (485A), brown wire (485B). All wiring points must undergo waterproof treatment. It is recommended to use cables with certain anti-corrosion performance for extension.

NBL-MPS-400B Online Multi-Parameter Self-Cleaning Digital Water Quality Sensor Application Scenarios

1. Wastewater Treatment Plant Online Monitoring: Real-time monitoring of inlet and outlet water pH, dissolved oxygen, turbidity and other parameters to assist process optimization and compliant discharge control, reducing manual inspections.

2. Aquaculture Intelligent Management: Simultaneous monitoring of key indicators such as dissolved oxygen, pH, salinity, and temperature to ensure stable aquaculture water bodies and reduce fish and shrimp mortality risks.

3. River and Lake Environmental Monitoring: Submerged installation at monitoring sections supports long-term unattended operation and enables remote transmission and early warning of water quality data through IoT platforms.

4. Industrial Circulating Cooling Water and Boiler Makeup Water Monitoring: Monitoring conductivity, ORP and other parameters to prevent scaling and corrosion and extend equipment service life.

5. Municipal Water Supply and Secondary Water Supply Systems: Ensuring water quality safety and integrating into SCADA systems for multi-point linked monitoring.

6. Marine and Nearshore Water Investigation: Using marine-grade connectors and protective design to adapt to high-salinity and high-biological-attachment environments.

Wiring and Installation Instructions

During installation, it is recommended to use a lifting ring for fixing or install through the three M8 threaded holes on the top cover to avoid direct tension on the cable. The sensor is designed for submerged installation, and the installation depth should be determined according to the actual water level.

Electrical Connection (4-core shielded cable):

• Red wire → 12VDC power positive

• Black wire → GND ground

• Blue wire → 485A

• Brown wire → 485B

Before powering on, please carefully check the wire sequence to prevent reverse connection from damaging the device. Given that the cable is long-term underwater or in a humid environment, all wiring points must undergo strict waterproof sealing treatment, and cables with certain anti-corrosion performance should be selected for extension.

FAQ

Q1: How many parameters can the NBL-MPS-400B measure simultaneously?

A: The product adopts an integrated design and can simultaneously measure up to 6 parameters (including temperature). Modules such as dissolved oxygen, pH, ORP, conductivity/salinity, and turbidity are optional, and the specific configuration can be flexibly combined according to project requirements.

Q2: How to set the automatic cleaning function?

A: The sensor has a built-in cleaning brush and supports remote or local setting of cleaning interval time and cleaning times via Modbus protocol. It can adapt to water quality environments with different pollution levels and significantly reduce manual maintenance.

Q3: Does the RS485 Modbus protocol support seamless integration with other devices?

A: Yes. The product strictly follows the Modbus/RTU standard and can be directly connected to various PLCs, data collectors, IoT gateways or host computer software. It has strong anti-interference capability and flexible networking.

Q4: What is the maintenance frequency in highly polluted water bodies?

A: The automatic cleaning device can effectively remove surface dirt and microorganisms. Combined with the copper-containing protective cover design, the maintenance cycle can usually be extended to several months. It is recommended to perform manual inspection and calibration once per quarter according to on-site water quality.

Q5: Can the sensor protection rating meet the requirements for long-term underwater installation?

A: The whole machine reaches IP68 protection rating with working pressure ≤0.2MPa. It uses 316L stainless steel and POM materials, making it suitable for long-term submerged environments such as rivers, sewage tanks, and aquaculture ponds.

Q6: How to calibrate the sensor?

A: Each parameter supports single-point or two-point calibration using the corresponding standard solution. Please refer to the sub-sensor manual for specific operation methods. Calibration parameters are stored inside the sensor, so there is no need to reconfigure the host computer after replacement.

Q7: Can the cable length be extended?

A: The standard 5-meter cable is provided and can be reasonably extended, but the same specification shielded cable must be used, and all connectors must be waterproofed to avoid signal attenuation or interference.

Q8: What is the product warranty period?

A: Dissolved oxygen, turbidity, conductivity/salinity, pH and other sensors have a 1-year warranty. The multi-parameter probe main body has a 3-year warranty, and consumables have a 3-month warranty. Corresponding after-sales service is provided for non-man-made damage.

Summary and Cooperation Invitation

The NiuBoL NBL-MPS-400B online multi-parameter self-cleaning digital water quality sensor provides an efficient solution for water environment monitoring projects with its stable and reliable performance, advanced self-cleaning technology, and convenient RS485 Modbus integration. It not only significantly reduces system integration and operation & maintenance costs but also ensures data continuity and accuracy, helping engineering contractors and system integrators create high-value projects in wastewater treatment, ecological monitoring, and smart aquaculture.

If you are planning an online water quality monitoring system or need customized configuration solutions for specific working conditions, please feel free to contact the NiuBoL technical team. We will provide detailed technical selection support, installation guidance, and long-term stable supply assurance to jointly promote more intelligent and reliable water environment monitoring applications.

NBL-MPS-400B online multi-parameter self-cleaning digital water quality sensor Data Sheet

NBL-MPS-400B online multi-parameter self-cleaning digital water quality sensor.pdf