YEX-S2-FUV-200 Online Full-Spectrum Multi-Parameter Sensor

No reagents, no interruption — Truly stable multi-parameter water quality monitoring

Traditional water quality monitoring relies on reagent consumption, frequent maintenance, and complex calibration processes. The YEX-S2-FUV-200 Online Full-Spectrum Multi-Parameter Sensor adopts the full-spectrum absorption method, simultaneously collecting full-band spectral information from near-ultraviolet to near-infrared. It continuously measures COD, BOD, TOC, Color, and Turbidity online without reagents or secondary pollution. With automatic turbidity interference compensation and long-term anti-drift capability, it truly achieves maintenance-free, high-precision online monitoring.

Three Core Advantages

• No Reagents, No Pollution
  Pure optical measurement, no chemical consumption, meets green monitoring requirements, and significantly reduces long-term operating costs.

• Automatic Turbidity Interference Compensation
  Built-in algorithm effectively suppresses interference from particulate suspended solids, ensuring data remains stable and reliable in complex water bodies.

• RS-485 Modbus/RTU, Easy Integration
  Standard industrial interface and protocol, can be quickly connected to PLC, DTU, and water quality monitoring platforms, supporting secondary development and system integration.

Product Value

The YEX-S2-FUV-200 is not only a multi-parameter sensor but also a long-term stable, low-maintenance water quality monitoring solution. It solves core problems of traditional sensors in complex water bodies such as sewage, surface water, and industrial discharge, including susceptibility to turbidity interference, severe baseline drift, and short maintenance cycles.

Through full-spectrum acquisition and spectral compensation algorithms, the sensor can simultaneously output five key water quality parameters from the same optical window without reagent consumption, greatly lowering the usage threshold and overall cost. It is suitable for online water quality monitoring stations, wastewater treatment plant process control, river section monitoring, and other scenarios.

Technical Advantages

Full-Spectrum Acquisition, Comprehensive Parameters

Adopting a high-performance xenon light source and micro fiber optic spectrometer, covering 200nm to near-infrared band, it can simultaneously collect absorption information of characteristic substances at different wavelengths, realizing simultaneous measurement of COD, BOD, TOC, Color, and Turbidity.

Turbidity Interference Compensation Mechanism

In water bodies, particulate suspended solids cause optical path attenuation and affect the accuracy of optical measurements. The YEX-S2-FUV-200 quantifies the influence of particulates on the spectrum through specific spectral compensation algorithms and performs mathematical correction, significantly reducing the interference of turbidity on parameters such as COD and Color.

316L Stainless Steel, IP68 Protection

The sensor housing is made of 316L stainless steel, offering good corrosion resistance and mechanical strength. With an IP68 protection rating, it can operate stably when submerged within 2 meters depth for a long time. Suitable for complex water quality environments such as municipal sewage, industrial wastewater, and surface water.

Anti-Drift and Low Power Consumption Design

• Xenon light source and spectrometer system ensure signal stability during long-term operation

• Device power consumption is only 0.2W@12V, suitable for solar-powered or battery-powered sites

• Anti-interference circuit design, adapted to industrial site electromagnetic environments

Convenient Maintenance and Long-Life Design

• Maintenance-free: No frequent cleaning or calibration required under normal conditions

• Optional self-cleaning brush structure to reduce biological attachment

• Dynamic seal replacement every 18 months: Only need to return to factory for dynamic seal replacement, with controllable maintenance costs

YEX-S2-FUV-200 Online Full-Spectrum Multi-Parameter Sensor Technical Specifications

YEX-S2-FUV-200 Online Full-Spectrum Multi-Parameter Sensor Typical Application Scenarios

• Municipal Wastewater Treatment Plants: Continuous monitoring of COD and Turbidity at inlet, biochemical tank, and outlet for process control and over-standard early warning.

• Industrial Discharge Monitoring: Wastewater discharge outlets in textile, chemical, food and other industries to monitor organic matter and turbidity in real time to meet environmental compliance requirements.

• Surface Water and River Sections: Water quality monitoring stations in rivers and lakes for long-term continuous acquisition of BOD, TOC, and Color data to assist in judging water quality trends.

• Urban Drainage Networks and Pumping Stations: Installed in inspection wells or front pools of pumping stations for identification of rainwater-sewage mixing and pollution tracing.

• Aquaculture and Ecological Water Replenishment: Monitor organic pollution and turbidity in water bodies to assist water quality regulation and reduce aquaculture risks.

Wiring and Installation Instructions

Wiring Definition (4-core twisted shielded cable)

• Red: 12～24VDC Power Positive

• Black: GND Ground

• Blue: 485A

• White: 485B

Installation Notes

• The sensor should be placed horizontally with the measurement window facing the water flow direction

• Avoid water flow impacting walls or hard objects; secure in fast-flowing areas

• Submerge at least 30cm below the lowest water level to ensure no bubbles adhere

• Protective sleeve is recommended for the cable to avoid long-term tension

Waterproof Requirements
All wiring must be waterproofed. The cable itself should have corrosion resistance, especially suitable for seawater or sewage environments.

FAQ

Q1: Does the YEX-S2-FUV-200 require reagents or consumables?

No. It is based on the full-spectrum absorption method, requires no chemical reagents, produces no secondary pollution, and has no consumable costs during long-term operation.

Q2: Can it output COD, BOD, TOC, Color, and Turbidity simultaneously?

Yes. After one spectral acquisition, the sensor outputs five parameters simultaneously through model calculations.

Q3: Does turbidity affect COD measurement?

The sensor has a built-in turbidity interference compensation algorithm, which can effectively suppress the influence of particulate suspended solids on parameters such as COD and Color.

Q4: What communication protocol is supported?

It adopts RS-485 interface and standard Modbus/RTU protocol, which is convenient for integration into mainstream PLC, RTU and water quality monitoring platforms.

Q5: What are the installation depth and water temperature requirements?

Working water depth does not exceed 2 meters, water temperature range is 0～45℃, pressure <0.1MPa.

Q6: How to perform calibration?

Immerse the sensor in deionized water, ensure no bubbles in the optical path, and send the spectral calibration command to complete the process.

Q7: How often does it need maintenance?

Maintenance-free under normal conditions; after 18 months of continuous use, it is recommended to return to the factory to replace the dynamic seal. Cleaning depends on the degree of water pollution.

Q8: Can it be used in seawater or corrosive water bodies?

Yes. The housing is made of 316L stainless steel with IP68 protection rating, suitable for seawater, municipal sewage, and some industrial wastewater environments.

Summary and Action Suggestion

The YEX-S2-FUV-200 is a full-spectrum multi-parameter sensor designed for industrial and water environment monitoring scenarios that truly require “long-term stability without frequent intervention.” It eliminates dependence on reagents, solves data drift caused by turbidity interference, and lowers the integration threshold with low power consumption and RS-485 Modbus standard interface.

If you are looking for an online sensor that can continuously monitor COD, BOD, TOC, Color, and Turbidity with real anti-interference capability and long-term stability, the YEX-S2-FUV-200 is a worthy choice for your technical solution.

For customized ranges, cable lengths, or integration support, please contact the Yexsensor technical team for engineering advice and sample testing support.