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Products Description
Yexsensor YEX-MPS-400B Online Multi-parameter Self-cleaning Water Quality Sensor: High-integration Industrial-grade Monitoring Core
In complex application scenarios such as smart water affairs, marine environmental monitoring and industrial wastewater treatment, how to reduce operation and maintenance costs under high-frequency monitoring while ensuring data consistency is a core challenge faced by system integrators. Yexsensor's YEX-MPS-400B is a digital multi-parameter sensor probe specially designed for long-term online monitoring.
By integrating advanced sensing technology and automated mechanical structure, the probe not only realizes synchronous acquisition of six parameters in a single unit, but also solves the industry problem of microbial attachment and scaling on the sensor surface through its iconic self-cleaning technology. It is the core sensing component for water treatment system integration and environmental telemetry stations.
YEX-MPS-400B Series Online Multi-parameter Self-cleaning Water Quality Sensor Core Technical Advantages and Design Architecture
Highly Integrated One-piece Solution
YEX-MPS-400B breaks the limitation of traditional monitoring stations that require the deployment of multiple independent sensors, integrating six core parameters — dissolved oxygen (DO), turbidity, conductivity/salinity, pH, ORP and temperature — into a compact shell with a diameter of only tens of millimeters. This integrated design greatly simplifies on-site deployment logic, reduces perforation and wiring requirements, and ensures the data correlation of all parameters at the same sampling point and on the same time axis.
Intelligent Self-cleaning and Anti-interference Technology
For biofilm and particulate pollution caused by long-term immersion in complex water quality (such as seawater or eutrophic freshwater), Yexsensor adopts a dual protection strategy:
Physical Cleaning: Built-in high-reliability motor-driven automatic cleaning brush. Users can flexibly configure cleaning interval time and rotation cycles according to the actual environmental pollution level.
Material Resistance: The front-end sensor protective cover adopts special copper-containing metal material. Copper-containing materials can naturally release trace ions to inhibit microbial growth. Combined with physical brushing, it can significantly extend the maintenance cycle.
Industrial-grade Communication and Connectivity
The probe natively supports the RS-485 bus and follows the standard Modbus RTU communication protocol. This means that system integrators can seamlessly connect the sensor to PLC, RTU or various cloud IoT platforms without complex analog signal conversion. Each sensor is equipped with a professional marine-grade connector as standard, ensuring electrical connection reliability and easy disassembly in harsh diving environments.
YEX-MPS-400B Series Online Multi-parameter Self-cleaning Water Quality Sensor Core Technical Specifications and Range Parameters
As a high-performance monitoring terminal, Yexsensor YEX-MPS-400B demonstrates excellent industrial standards in measurement accuracy and range coverage.
1. Monitoring Parameter Performance Indicators
| Parameter | Range | Resolution | Accuracy |
|---|---|---|---|
| Dissolved Oxygen (DO) | 0.00～20.00 mg/L | 0.01 | ±2% F.S. |
| Turbidity (Turbidity) | 0～20.00 / 200.0 / 1000 NTU | 0.01 / 0.1 | ±3% or ±1.5 NTU (whichever is greater) |
| Conductivity (Cond) | 0～200.0 mS/cm | 0.1 | ±1.5% F.S. |
| Salinity (Salinity) | 0～70.0 PSU | 0.1 | ±1.5% F.S. |
| pH Value | 0.00～14.00 | 0.01 | ±0.1 pH |
| Oxidation-Reduction Potential (ORP) | -1500～+1500 mV | 1 | ±6 mV |
| Temperature (Temp) | 0～50.0°C | 0.1 | ±0.3°C |
2. Hardware Physical Characteristics
| Item | Parameter |
|---|---|
| Output Method | RS-485 (Modbus RTU) |
| Power Supply Voltage | 12V DC |
| Operating Power Consumption | 2W @ 12V |
| Shell Material | POM (Polyoxymethylene) and 316L stainless steel |
| Protection Level | IP68 (supports submersible installation) |
| Working Pressure | ≤0.2 MPa |
| Environmental Conditions | Storage: -5～65°C；Operating: 0～60°C |
| Connector Specification | Professional marine-grade connector (male) |
YEX-MPS-400B Series Online Multi-parameter Self-cleaning Water Quality Sensor Electrical Connection and Engineering Deployment
1. Wire Sequence Definition and Wiring Specification
To ensure wiring accuracy in large projects, YEX-MPS-400B adopts a standardized four-core shielded cable:
Red (VCC): Power positive pole (12V DC)
Black (GND): Ground wire / power negative pole
Blue (485A): RS-485 signal A
White (485B): RS-485 signal B
Engineering Note: When used in seawater or strongly corrosive environments, all wiring joints must undergo secondary waterproof sealing treatment. It is strictly prohibited for the cable to directly bear mechanical stress. Use the three M8 threaded holes or special lifting rings at the top of the probe for force fixing to avoid damaging the marine connector.
2. Installation Structure Recommendations
The slotted protective cover at the front end of the probe provides mechanical protection while allowing free fluid exchange, ensuring an extremely high response time (T90). During submersible installation, ensure that the probe is fully immersed below the liquid surface and avoid bubble accumulation areas or flow dead zones.
YEX-MPS-400B Series Online Multi-parameter Self-cleaning Water Quality Sensor Typical Application Scenarios
Yexsensor YEX-MPS-400B's high reliability makes it the preferred monitoring component in the following fields:
Surface Water Automatic Monitoring Stations: Deployed on river and lake monitoring buoys to provide long-term water quality evolution trend data.
Marine Ranches and Nearshore Projects: Utilizing marine connectors and self-cleaning characteristics to combat biological attachment in seawater aquaculture monitoring.
Sewage Treatment Process Control: Monitor dissolved oxygen in aeration tanks and turbidity and pH at inlet and outlet to optimize process logic in real time.
Smart City Secondary Water Supply: Integrated into pipe network terminal monitoring terminals to ensure the safety of residents' drinking water.
Groundwater Environmental Assessment: Long-term deployment in monitoring wells to evaluate groundwater pollution and salinization levels.
Maintenance Cycle and Troubleshooting Logic
Maintenance Plan Recommendation Table
| Task Content | Frequency Suggestion | Operation Key Points |
|---|---|---|
| Surface Inspection | Once per month | Check cleaning brush wear, copper-containing protective cover status and cable integrity |
| Manual Cleaning | Depending on environment | Rinse with tap water; use neutral detergent and soft cloth for stubborn stains |
| Standard Solution Calibration | Perform regularly | Use standard solution for single-point or two-point calibration according to on-site accuracy requirements |
Frequently Asked Questions (FAQ)
Q1: Why does Yexsensor use copper-containing metal instead of ordinary full stainless steel for the protective cover?
A1: Copper has a natural trace antibacterial effect in water, which can effectively prevent the initial attachment of algae, barnacles and other microorganisms. This forms a dual synergistic effect with the mechanical cleaning brush, significantly reducing sensor data drift caused by biological coverage.
Q2: How to configure the self-cleaning frequency of the sensor?
A2: Users can write to the corresponding register address through Modbus commands to customize the cleaning interval (such as every 12 or 24 hours) and the number of rotations of a single cleaning brush to match the pollution rate of different water qualities.
Q3: Does the probe support hot swapping? Does module replacement require return to factory?
A3: Yexsensor adopts a modular design. The core body has a three-year warranty, but components such as pH or dissolved oxygen are chemical consumables. Their replacement and calibration can be completed on site according to procedures. It is recommended to perform module maintenance through the marine connector in a power-off state.
Q4: There is no return signal in RS-485 communication. How to troubleshoot?
A4: First check whether the power supply voltage is stable at 12V; secondly confirm whether the A/B wire sequence is correct; if the cable exceeds 100 meters, confirm the shielding layer grounding and consider adding a matching resistor.
Q5: What is the reason for abnormal fluctuations or continuous instability in measured values?
A5: Usually due to a large number of air bubbles or microorganisms attached to the sensor surface. Please start the self-cleaning device or manually clean the sensor surface, and refer to the technical manual of each sub-sensor for troubleshooting.
Q6: Can YEX-MPS-400B withstand high-pressure pipeline monitoring?
A6: The probe is designed for submersible monitoring with a rated pressure resistance of 0.2 MPa (equivalent to about 20 meters water depth). If it needs to be applied to high-pressure industrial pipelines, please consult the technical team to evaluate a customized pressurized shell solution.
Q7: How is the power consumption of the multi-parameter probe? Is it suitable for solar power supply?
A7: The probe has a rated power consumption of only 2W, with extremely high energy efficiency ratio. It is very suitable for field telemetry stations, buoy systems or mobile monitoring vehicles equipped with solar panels and batteries.
Q8: Does the data output by the sensor require external calculation for temperature compensation?
A8: No. Yexsensor YEX-MPS-400B has a built-in high-precision temperature sensor inside. All measured pH, conductivity and dissolved oxygen data have been automatically temperature compensated (ATC) at the device end, and the output is the corrected value at the standard reference temperature.
Summary
Yexsensor YEX-MPS-400B online multi-parameter self-cleaning sensor is not only a high-precision measurement unit, but also a mature industrial-grade solution optimized for system integrators. Through the trinity design of "hardware anti-fouling + mechanical cleaning + digital communication", it greatly reduces the full life cycle maintenance cost of online monitoring systems. In the wave of smart environmental construction and Industry 4.0, Yexsensor is always committed to providing stable and reliable water quality sensing cores for global partners.
Do you need targeted installation guidance or detailed Modbus communication protocol manual for specific scenarios (such as high-salinity seawater or specific industrial wastewater)?
