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Products Description
Yexsensor YEX-FUV-408 Online Full-Spectrum Multi-Parameter Sensor: Digital Innovation in Industrial-Grade Water Quality Monitoring
In the field of environmental water quality monitoring, traditional chemical (wet) analyzers are gradually being replaced by more efficient optical analysis technologies due to high operation and maintenance costs, reagent pollution, and response lag. Yexsensor YEX-FUV-408 is based on ultraviolet-visible full-spectrum absorption spectroscopy (UV-Vis Absorption Spectroscopy), integrating complex laboratory spectroscopic analysis technology into an industrial-grade submersible probe, realizing real-time, non-destructive, and online monitoring of multiple water quality parameters.
The sensor utilizes the characteristic absorption spectra of different substances in the near-ultraviolet to near-infrared bands, combined with advanced algorithm models, to synchronously output data on COD, BOD, TOC, chromaticity, turbidity, and nutrients (TN/TP/NH₄-N, etc.). It is a core tool for system integrators to build modern water quality automatic monitoring stations.
YEX-FUV-408 Online Full-Spectrum Multi-Parameter Sensor Core Working Principle: UV-Vis Full-Spectrum Analysis Technology
1. Wide Spectrum Scanning and Fingerprint Spectrum
YEX-FUV-408 uses a high-performance xenon lamp as a pulsed light source, emitting continuous wavelength light covering ultraviolet to near-infrared. When the light beam passes through the measurement gap (optical path), dissolved organic matter, nitrate, and suspended matter in the water absorb light energy at specific wavelengths.
Through the built-in miniature fiber optic spectrometer, the sensor captures full-band spectral information to form the "fingerprint spectrum" of the water sample. This full-spectrum scanning technology can extract richer material characteristic information compared to single-wavelength or dual-wavelength measurement, greatly improving the accuracy of data in complex water samples.
2. Automatic Turbidity Compensation and Algorithm Correction
To address the scattering interference caused by particulate suspended matter in water, YEX-FUV-408 introduces a dynamic compensation algorithm. By monitoring the near-infrared reference band signal, the algorithm can automatically calculate and eliminate the influence of turbidity on absorption intensity, ensuring the stability and consistency of measurements in harsh environments.
YEX-FUV-408 Online Full-Spectrum Multi-Parameter Sensor Technical Performance and Core Range Specifications
YEX-FUV-408 demonstrates extremely high integration. A single sensor can replace multiple single-parameter analyzers, greatly reducing the difficulty of system integration.
1. Multi-Parameter Measurement Range Table
| Measurement Parameter | Range | Resolution | Measurement Accuracy |
|---|---|---|---|
| Chemical Oxygen Demand (COD) | 0～200 mg/L (equiv. KHP) | 0.1 mg/L | ±5% F.S. |
| Biochemical Oxygen Demand (BOD) | 0～150 mg/L | 0.1 mg/L | ±5% F.S. |
| Total Organic Carbon (TOC) | 0～150 mg/L | 0.1 mg/L | ±5% F.S. |
| Turbidity (Turbidity) | 0～400 NTU | 0.1 NTU | ±5% F.S. |
| Color (Color) | 0～500 Hazen | 0.1 Hazen | ±5% F.S. |
| Total Phosphorus (TP) | 0～15 mg/L | 0.1 mg/L | ±5% F.S. |
| Total Nitrogen (TN) | 0～100 mg/L | 0.1 mg/L | ±5% F.S. |
| Ammonium Nitrogen (NH₄-N) | 0～80 mg/L | 0.1 mg/L | ±5% F.S. |
| Nitrate | 0～15 mg/L | 0.01 mg/L | ±5% F.S. |
| Nitrite | 0～10 mg/L | 0.01 mg/L | ±5% F.S. |
2. Hardware Physical Specifications
| Item | Parameter Description |
|---|---|
| Output Mode | RS-485 (Modbus RTU) |
| Supply Voltage | 12～24V DC |
| Low Power Consumption Operation | 0.2W @ 12V |
| Housing Material | 316L Stainless Steel (Industrial Corrosion-Resistant Design) |
| Protection Rating | IP68 |
| Installation Method | Submersible / Suspended Installation |
| Cable Definition | Red (VCC), Black (GND), Blue (485A), White (485B) |
YEX-FUV-408 Online Full-Spectrum Multi-Parameter Sensor Engineering Installation and Field Integration Guide
1. Installation Posture and Depth Control
When deploying YEX-FUV-408 on site, it is recommended to fix the sensor horizontally, and the measurement window (optical path gap) should face the water flow direction to utilize the flow velocity for natural primary self-cleaning.
Depth requirement: Considering seasonal fluctuations in water level, the sensor should be installed 30 cm below the lowest water level, and the total depth is recommended not to exceed 2 meters.
Protection suggestion: In fast-flowing environments, the sensor must be rigidly fixed and cable protection sleeves must be installed to prevent impact damage to precision optical components.
2. Electrical Integration Suggestions
The sensor natively supports the Modbus RTU protocol, and system integrators can directly connect it to an IoT gateway or data acquisition module.
Note: The full-spectrum sensor contains a precision spectral analysis unit inside. Before powering on, the wiring definition must be carefully checked to prevent polarity reversal from damaging the mainboard.
YEX-FUV-408 Online Full-Spectrum Multi-Parameter Sensor Typical Application Scenarios
Wastewater Treatment Plant Process Monitoring: Real-time monitoring of COD, BOD and nutrient concentrations at inlet and outlet, controlling aeration systems and dosing processes through data feedback.
Surface Water Environmental Automatic Stations: Deployed at river and lake monitoring points to provide reagent-free, pollution-free long-cycle online water quality assessment.
Industrial Wastewater Discharge Monitoring: Provide early warning of characteristic pollutant exceedance for discharge outlets in chemical, pharmaceutical and other industries.
Smart City Water Affairs: Integrated into urban rainwater and sewage pipe network monitoring points to identify illegal discharges and rainwater-sewage mixing.
Process Water Quality Monitoring: Organic load monitoring in food and beverage industry processes.
Maintenance and Fault Diagnosis
1. Periodic Inspection
Although the full-spectrum sensor has extremely high stability, the cleanliness of the optical window directly determines the measurement accuracy.
Window cleaning: It is recommended to regularly wipe the measurement gap with tap water and a soft cloth. For grease contamination, neutral detergent can be used as an aid.
Self-cleaning brush maintenance: Every 18 months, it is recommended to return to the factory for dynamic seal replacement and cleaning brush component inspection to maintain long-term protection performance.
2. Spectral Calibration
When drift occurs before use or after long-term operation, place the sensor in deionized water, ensure the optical path is completely submerged and free of bubbles, and send a spectral calibration command via Modbus to quickly complete the reference reset.
FAQ
Q1: What is the difference between the COD measured by Yexsensor full-spectrum method and the laboratory potassium dichromate method?
A1: The laboratory method is a chemical oxidation method, while the full-spectrum method is a physical optical method. The full-spectrum method outputs results by establishing a correlation model between spectral absorption and chemical content. Its advantages lie in "fast" and "continuous", making it very suitable for online trend monitoring and process control.
Q2: Does the sensor support measurement of TP (Total Phosphorus) and TN (Total Nitrogen)?
A2: Yes. YEX-FUV-408 can achieve simultaneous estimation of TN, TP and nitrate and other nutrients through analysis of specific absorption characteristics in the ultraviolet band combined with multi-dimensional modeling, without any chromogenic reagents.
Q3: If there are many suspended particles in the water sample, will it affect the measurement?
A3: The sensor has a built-in turbidity compensation algorithm. In turbidity environments within 400 NTU, the system can automatically filter out scattering interference. If turbidity continues to exceed this range, it is recommended to add a pre-settling step.
Q4: What is the lifetime of the xenon light source?
A4: We use a high-performance pulsed xenon lamp. Since it is only triggered at the moment of measurement, the effective working life can usually cover 5-8 years, far exceeding traditional continuous mercury lamps or halogen lamps.
Q5: Why must direct sunlight be avoided?
A5: The full-spectrum sensor has a built-in ultra-high-sensitivity miniature spectrometer. Prolonged strong light exposure may cause accelerated aging of optical components, and the temperature rise caused by exposure may lead to calibration reference offset.
Q6: Can it be used in environments containing strong acids or strong alkalis?
A6: The probe body is made of 316L stainless steel. It performs excellently in conventional neutral and weakly corrosive wastewater. If it needs to be used in highly corrosive environments (such as high-concentration acids), please consult Yexsensor for customized special material solutions.
Q7: What is the response time for simultaneous multi-parameter measurement?
A7: The total time for full-band scanning and algorithm calculation inside the sensor is less than 10 seconds. The measurement is almost real-time, greatly improving the system's early warning timeliness.
Q8: Why is the installation depth recommended not to exceed 2 meters?
A8: It is mainly considering the water pressure at diving depth (0.2 MPa) and the convenience of on-site maintenance. The IP68 design is sufficient for conventional installation, but ultra-deep installation will impose higher requirements on cable protection and dynamic sealing devices.
Summary
Yexsensor YEX-FUV-408 full-spectrum multi-parameter sensor represents the pinnacle of online water quality monitoring technology. It integrates "full-spectrum analysis", "self-cleaning mechanical design" and "low-power digital transmission" into one, completely solving the pain points of cumbersome operation and maintenance of traditional chemical analyzers. For system integrators, choosing YEX-FUV-408 not only means obtaining high-precision data, but also obtaining a green water quality sensing terminal that is reagent-free, low-consumable, and can operate stably for a long time.
