Yexsensor YEX-S2-CHLO-8S: High-Precision Fluorescence Online Chlorophyll Sensor

Overcoming engineering pain points in water quality monitoring such as “difficult algae bloom early warning, sensors prone to contamination, and short maintenance cycles”

• Intelligent Self-Cleaning System: Built-in high-strength cleaning brush completely solves the problem of biological attachment on the measurement window, significantly extending the on-site maintenance-free period.

• High-Precision Fluorescence Technology: 0.1 ug/L ultra-high resolution, immune to ambient light interference, accurately captures subtle changes in phytoplankton.

• Industrial-Grade Three-Proof Standard: 316L stainless steel material combined with IP68 protection rating, supports 20-meter depth pressure, suitable for harsh field and marine environments.

YEX-S2-CHLO-8S Online Chlorophyll Sensor Product Overview

In current water environment monitoring and resource management, the content of chlorophyll a is a core indicator for measuring water eutrophication, assessing algae biomass, and early warning of red tides/water blooms. The YEX-S2-CHLO-8S online chlorophyll sensor launched by Yexsensor is developed based on leading fluorescence detection technology.

Unlike traditional laboratory extraction methods, this sensor requires no chemical reagents and can be directly immersed in water for real-time, continuous monitoring. Its integrated design incorporates a high-efficiency power management module and precision optical structure, which not only provides excellent anti-interference capability but also enables easy integration into various smart water conservancy platforms, buoy stations, and remote monitoring systems through digital signal output (RS-485), providing users with long-term stable and reliable data support.

YEX-S2-CHLO-8S Online Chlorophyll Sensor Core Technical Advantages

1. Fluorescence Measurement Technology: High Sensitivity and Anti-Interference

YEX-S2-CHLO-8S adopts the fluorescence method principle, emitting excitation light of a specific wavelength to irradiate chlorophyll a in water, causing it to produce fluorescence of a specific wavelength. The fluorescence intensity detected by the sensor is proportional to the concentration of chlorophyll a in the water body. This method has higher sensitivity and selectivity compared to spectrophotometry, especially showing exceptional stability in low-concentration water monitoring, and is not severely affected by water turbidity.

2. Mechanical Self-Cleaning Module: Ensuring Long-Term Online Accuracy

In long-term online monitoring, the measurement window is easily covered by organisms (such as algae and attachments) or contaminated by sediment, leading to data drift. The Yexsensor R&D team has equipped this sensor with a timed automatic cleaning brush, allowing users to flexibly set the cleaning frequency according to the on-site environment. The physical scraping method effectively maintains the cleanliness of the optical window, reducing manual maintenance costs by more than 80%.

3. Precision Algorithm Optimization and Temperature Compensation

The fluorescence characteristics of chlorophyll are significantly affected by ambient temperature (showing an inverse relationship). The YEX-S2-CHLO-8S has a built-in high-precision Pt1000 temperature sensor and is equipped with Yexsensor’s proprietary temperature compensation algorithm, which can correct measurement errors caused by temperature differences in real time, ensuring that readings remain linearly stable within the 0～50℃ fluctuation range (R² ≥ 0.999).

4. Industrial-Grade Hardware Protection and Materials

Considering the corrosiveness of marine environments and extreme field conditions, the sensor housing is made of top-grade 316L stainless steel material with excellent resistance to salt spray corrosion. The sensor connector adopts an M16-5 pin professional waterproof aviation plug, combined with a double O-ring sealing design, ensuring normal long-term operation under 20-meter deep water pressure (0.2 MPa) without water seepage or condensation.

5. Easy Integration and Low Power Consumption Design

It supports the industrial standard RS-485 Modbus RTU protocol and can be directly connected to PLC, DCS, DTU or various acquisition instruments. Its operating power consumption is as low as 0.2W (@12V), making it very suitable for remote field stations or buoy systems powered by solar energy.

YEX-S2-CHLO-8S Online Chlorophyll Sensor Technical Specifications

YEX-S2-CHLO-8S Online Chlorophyll Sensor Application Scenarios

• Drinking Water Source Monitoring: Real-time monitoring of algae concentration in reservoirs and rivers to provide pretreatment warnings for water treatment plants and prevent water odor and toxin generation.

• Ecological Surveys and Marine Research: Used for marine voyage surveys and phytoplankton distribution studies to help scientists obtain large-scale spatial chlorophyll dynamic data.

• Smart Aquaculture: Monitor algae balance in aquaculture ponds. Appropriate algae provide oxygen, while excess leads to hypoxia. Achieve scientific feeding and oxygenation management through the Yexsensor sensor.

• Urban Landscape Water Treatment: For eutrophication control in park lakes and urban rivers, evaluate treatment effects, and promptly detect risks of green algae and cyanobacteria blooms.

FAQ

Q1: Can the self-cleaning frequency of Yexsensor sensors be customized?

Yes. Through the RS-485 interface, users can set the cleaning brush action cycle and reciprocating times according to the actual monitoring environment (such as waters with extremely high algae density) to achieve the best cleaning effect.

Q2: Why does the sensor need built-in temperature compensation?

The fluorescence efficiency of chlorophyll is greatly affected by temperature, usually showing “cold enhancement, heat quenching”. Without a built-in temperature compensation algorithm, environmental temperature differences would cause significant false alarms in readings. Our sensor achieves real-time correction through the built-in Pt1000.

Q3: Is the sensor affected by water turbidity?

Although the fluorescence method is less affected by suspended solids, extremely high turbidity will produce scattering interference. It is recommended to use turbidity compensation algorithms or conduct regular manual verification when used in environments where turbidity exceeds 200 NTU.

Q4: Can the 316L stainless steel housing be used in seawater?

Yes. 316L has excellent pitting corrosion resistance and is suitable for nearshore marine surveys and seawater aquaculture. For long-term immersion in extremely high salinity environments, regular inspection of scale on the housing surface is recommended.

Q5: What is the calibration cycle of the sensor?

Due to the self-cleaning function, our sensor can usually maintain calibration stability for 3-6 months. The specific calibration cycle depends on the requirements of the competent authority and the speed of biological attachment on site.

Q6: Can the sensor be connected to my PLC system?

Absolutely. The YEX-S2-CHLO-8S supports the standard Modbus RTU protocol and provides a register address table, allowing seamless integration with Siemens, Delta or various domestic PLCs as well as IoT cloud platforms.

Q7: Are there any special requirements for the installation position?

To obtain the most accurate readings, it is recommended that the sensor front-end measurement window maintains a distance of more than 3cm from the side wall and more than 10cm from the bottom to avoid wall reflections affecting the optical path.

Q8: Can the cable be replaced if damaged?

The sensor is standard configured with a 5-meter shielded cable. Due to the overall encapsulation technology used to ensure IP68 protection performance, if the cable is damaged, it is generally recommended to return it to the manufacturer or have it handled by professional personnel to ensure the sealing is not compromised.

Summary

The Yexsensor YEX-S2-CHLO-8S online chlorophyll sensor is not just a measurement tool; it is a reliable engineering solution designed for complex water environments. Its self-cleaning design and stable fluorescence detection technology completely solve the problem of data drift in long-term monitoring.

Looking for a cost-effective water quality monitoring solution?

We provide in-depth technical support and customized protocol development for engineers and integrators. If you need the latest Modbus register manual or bulk purchase quotation, please contact our technical consultant immediately to help your project land efficiently!