In modern water treatment and municipal water supply systems, minute fluctuations in turbidity often signal filter system failure or water safety risks. Traditional measurement equipment frequently faces challenges such as external light interference, frequent maintenance, and insufficient accuracy in low-range measurements. The YEXSensor YEX-S2-ZSA online turbidity sensor, with its innovative fiber optic structure and highly integrated flow cell design, provides the industry with a stable, accurate, and easily deployable solution for low-turbidity monitoring.

• Exceptional Precision: 0.001 NTU resolution ensures keen perception of minute impurity particles.

• Anti-Interference Performance: Unique fiber optic structure design completely eliminates interference from ambient stray light on measurement values.

• Low Maintenance: Infrared LED constant light source paired with a simple installation structure significantly reduces long-term operational and maintenance costs.

Water Quality Monitoring Solution

The YEXSensor YEX-S2-ZSA is a digital online monitoring instrument based on the 90° scattered light principle. It not only resolves stability issues during flow measurement but also integrates the sensor and sampling line perfectly through its all-in-one flow cell design. For treated water from water treatment plants, direct drinking water systems, and high-precision industrial ultrapure water fields, the YEX-S2-ZSA serves as a reliable "data sentinel," providing real-time monitoring of water clarity to ensure every drop produced meets stringent industry standards.

YEX-S2-ZSA Online Turbidity Sensor: Core Technical Advantages & Product Features

1. Optical Measurement Architecture

The YEX-S2-ZSA uses an infrared LED (860nm) as its light source. Due to infrared light's absorption characteristics in water and insensitivity to color, the sensor effectively reduces interference from water sample color on turbidity measurement. Combined with the 90° scattered light principle (compliant with ISO 7027 standard), it demonstrates excellent linearity and repeatability in low turbidity ranges.

2. Superior Anti-Interference Capability

Unlike traditional open measurement devices, the YEXSensor R&D team equipped it with a fiber optic structure. This design not only improves photoelectric conversion efficiency but, more importantly, effectively shields the sensitive optical components from strong external ambient light. It delivers true data even in environments with variable lighting, such as pump rooms or outdoor cabinets.

3. Highly Integrated Flow Cell System

To simplify on-site engineering, the product adopts an integrated sensor and flow cell design. Users no longer need to build complex sampling environments themselves; deployment is completed simply by connecting standard PE tubing. Its compact size makes it ideal for wall-mounted installation in space-constrained monitoring cabinets.

4. Digitalization & Easy Integration

The sensor incorporates high-precision signal processing circuits and supports the standard RS-485 (Modbus RTU) protocol. This means it can connect directly to PLCs, touchscreens, or Remote Terminal Units (RTUs) without requiring additional transmitter conversions, significantly saving system integration costs.

5. Rugged Industrial Design

The housing is made of high-performance composite material with an IP65 protection rating. The built-in Pt1000 temperature sensor supports automatic temperature compensation, ensuring consistent readings across different water temperatures (0~50℃).

YEX-S2-ZSA Online Turbidity Sensor Technical Specifications

YEX-S2-ZSA Online Turbidity Sensor: Multi-Sector Application Scenarios

The high-precision characteristics of the YEXSensor YEX-S2-ZSA make it an ideal choice for the following fields:

1. Municipal Water Supply Monitoring: Used for water quality monitoring at water treatment plant outlets, secondary pumping stations, and city network endpoints to ensure drinking water meets standards.

2. Direct Drinking Water & Purification Systems: Monitors the operational efficiency of Reverse Osmosis (RO) or Ultrafiltration (UF) membranes in commercial buildings, schools, and hospital direct drinking water projects.

3. Swimming Pool Water Quality Management: Real-time monitoring of pool water turbidity to assist automated chemical dosing systems, ensuring swimmer health.

4. Industrial Process Water: Widely used in food & beverage processing, pharmaceutical production water, and pre-treatment monitoring for electronics-grade ultrapure water.

FAQ

Q: Is the measurement range of the YEXSensor YEX-S2-ZSA only 10 NTU?

A: This model is designed for high-precision, low-turbidity environments, with a standard range of 0-10 NTU. If your application involves higher turbidity (e.g., raw water, wastewater), please consult our sales engineers for recommendations on other high-range models.

Q: Why is the inlet pressure required to be controlled below 0.2 MPa?

A: Excessive pressure may damage the flow cell structure or cause high flow rates that generate bubbles. Bubbles severely interfere with scattered light, leading to fluctuating readings. It is recommended to use it with the YEXSensor pressure reducing flow controller CVC-100.

Q: How often does the sensor need calibration?

A: Calibration frequency depends on water quality conditions and regulatory requirements. For clean drinking water environments, zero and slope calibration is typically recommended every 3-6 months. If readings drift significantly, clean the optical window and recalibrate promptly.

Q: What is the difference between this scattered light method and the transmitted light method?

A: The transmitted light method is suitable for high turbidity measurements, while the scattered light method (especially at 90°) offers higher sensitivity and accuracy at low turbidity levels. It is the preferred online measurement method in current domestic and international drinking water standards.

Q: Can the cable length be extended?

A: The sensor comes standard with a 5-meter shielded cable. As it uses RS-485 signal transmission, the theoretical transmission distance can exceed 1000 meters. For custom-length raw cables, please inform us before placing your order.

Q: How can bubble generation during measurement be prevented?

A: It is recommended to keep the drain pipe discharging directly without upward bends or compression. Also, control the inlet flow rate below 300ml/min. Stable, low flow is key to avoiding bubble formation and ensuring measurement accuracy.

Q: How should I clean a dirty sensor window?

A: Rinse with clean water. For stubborn dirt, use a damp soft cloth with a small amount of household detergent to gently wipe. Never use strong corrosive chemical solvents or hard objects to scrape the optical window.

Summary

The YEXSensor YEX-S2-ZSA online turbidity sensor successfully brings laboratory-grade measurement precision into industrial field environments. Through deep optimization of scattered light technology and structural integration, it not only provides users with accurate water quality data but also significantly reduces long-term operational costs through simplified maintenance and a rugged design.

Want to learn more about the detailed parameters of YEXSensor water quality monitoring solutions or get customized advice for your project? Contact our engineering team today.