Yexsensor YEX-CL-206 Industrial Online Residual Chlorine Sensor: High-Precision, Low-Maintenance Water Quality Monitoring Tool

In modern smart water affairs and automated water treatment systems, real-time monitoring of residual chlorine content is a core link to ensure disinfection effectiveness and equipment safety. The YEX-CL-206 online residual chlorine sensor developed by Yexsensor has become the preferred solution for global system integrators and environmental protection engineering parties with its excellent electrochemical performance and digital output capability.

Core Technical Advantages: Efficient Monitoring Led by Constant Voltage Method

1. Advanced Constant Voltage Measurement Principle

Compared with traditional DPD colorimetric method or membrane method (polarographic method), the Yexsensor YEX-CL-206 adopts leading constant voltage technology. By applying a constant polarization potential on the electrode surface, it directly measures the current generated by the reaction of hypochlorous acid (HClO).

• Zero consumables design: No need to replace membranes or add electrolyte, greatly reducing long-term operating costs.

• Ultra-fast response: T90 response time is less than 90 seconds, capable of capturing subtle changes in water quality fluctuations in real time.

• High stability: Special alloy material electrodes are used to effectively resist chemical corrosion and reduce zero point drift.

2. Digital Integration and Anti-Interference Capability

The sensor has a built-in high-performance microprocessor and supports the standard RS-485 (Modbus RTU) digital protocol.

• Long-distance transmission: Digital signals have strong anti-interference ability and support stable signal transmission up to hundreds of meters.

• Plug and play: Easy integration into PLC, DCS or various IoT monitoring platforms.

• Intelligent compensation: Built-in Pt1000 automatic temperature compensation, which automatically corrects measurement errors caused by temperature within the 5-50°C range.

YEX-CL-206 Industrial Online Residual Chlorine Sensor: Wide Application Environments and Industry Solutions

The Yexsensor YEX-CL-206 is designed to cope with complex water quality environments and is widely used in the following fields:

• Municipal drinking water treatment
  In the effluent section of water treatment plants and secondary water supply networks, real-time monitoring of residual chlorine concentration is the key to preventing bacterial growth and ensuring the safety of residents' water use. YEX-CL-206 can ensure that the residual chlorine content is always within the golden range specified by national standards.

• Swimming pools and water parks
  Swimming pool water requires frequent disinfection. Excessively high residual chlorine will irritate human skin, while too low will fail to kill bacteria. Through the real-time feedback of the Yexsensor sensor, closed-loop automatic control of the dosing pump can be achieved, which is both energy-saving and safe.

• Cooling circulating water systems
  In industrial cooling towers, residual chlorine is used to inhibit algae and biological slime. The IP68 high protection rating of YEX-CL-206 enables it to perform stably in humid and high-temperature industrial environments, ensuring heat exchange efficiency.

• Bottled water and food production lines
  Food-grade water has strict requirements for the dechlorination process. This sensor can accurately monitor the residual chlorine after activated carbon filters to ensure that the production process meets biosafety standards.

YEX-CL-206 Industrial Online Residual Chlorine Sensor Technical Parameters and Specifications

YEX-CL-206 Industrial Online Residual Chlorine Sensor Installation Guide and Electrical Connection

Scientific Flow-through Installation

To ensure measurement accuracy, the sensor must be used with the dedicated flow cell from Yexsensor:

• Installation position: The sensor measuring end should be fixed near the inlet of the flow cell, avoiding being close to the outlet to ensure uniform flow velocity.

• Flow velocity recommendation: Water flow velocity is recommended to be controlled between 30-60 L/h. Constant flow velocity helps establish a stable electrochemical boundary layer.

• Exhaust design: Air bubbles should be excluded during installation to prevent bubbles from adhering to the electrode surface and causing reading fluctuations.

Standard Electrical Wiring

The cable uses 4-core twisted shielded wire, with the following wiring definitions:

• Red wire: Power positive pole (V+)

• Black wire: Power negative pole (GND)

• Blue wire: RS-485 A

• White wire: RS-485 B

Maintenance reminder: All wiring must be waterproof sealed. Considering the industrial environment, it is recommended that the user cable has anti-corrosion capability to extend system life.

YEX-CL-206 Industrial Online Residual Chlorine Sensor Maintenance, Care and Calibration Guide

Electrode Activation

Key step: For new sensors or electrodes that have been stored dry for a long time, they must be placed in tap water and left to stand for 24 hours for activation before use to restore the activity of the electrode surface.

Calibration Process

It is recommended that professionals perform calibration when numerical deviations occur:

• Zero point calibration: Perform in chlorine-free water to ensure the sensor output returns to the benchmark.

• Slope calibration: Use 1～2mg/L HClO standard solution in a flowing flow cell. Please refer to national standards for residual chlorine determination (such as DPD method) for calibration standards.

Common Questions and Answers (FAQ)

Q1: Does the Yexsensor YEX-CL-206 require frequent replacement of reagents?

A1: No. This sensor is based on the electrochemical constant voltage principle and does not require any colorimetric reagents or chemicals. It is a true low-maintenance design.

Q2: Why is the flow rate recommended to be between 30-60L/h?

A2: The constant voltage method is sensitive to the thickness of the diffusion layer. A constant flow rate ensures that reactants continuously and uniformly reach the electrode surface, thereby ensuring the reproducibility and accuracy of the measurement.

Q3: Can the sensor measure seawater?

A3: The YEX-CL-206 adopts an ABS/PC anti-corrosion housing and has certain corrosion resistance. However, in high salinity environments, it is recommended to shorten the maintenance cycle and apply additional anti-corrosion sealing to the wiring.

Q4: Will fluctuations in pH value affect residual chlorine readings?

A4: Yes. The form of residual chlorine in water is affected by pH. The sensor is recommended to operate in a pH 4-9 environment. If the on-site pH fluctuates drastically, it is recommended to connect a pH sensor for linkage compensation.

Q5: What does the sensor's protection rating IP68 mean?

A5: This means the sensor has complete dustproof capability and can work submerged in water for a long time under specific pressure. However, for residual chlorine measurement, we still recommend using flow cell installation to obtain stable readings.

Q6: How to determine if the electrode needs cleaning?

A6: If the reading response becomes very sluggish, or the value is significantly low in standard solution, it may be due to scaling on the electrode surface. It can be gently wiped with a soft cloth and very dilute weak acid.

Q7: Does it support access to domestic PLCs?

A7: As long as the PLC supports the standard Modbus RTU protocol (RS-485 physical layer), the Yexsensor sensor is fully compatible.

Q8: What should I do if the standard 5-meter cable is not long enough?

A8: We can provide cable customization services according to your engineering needs. Since it is digital signal transmission, appropriately extending the cable will not affect measurement accuracy.

Quality Assurance and After-sales Commitment

Yexsensor is committed to providing excellent product experience:

• Strict quality inspection: Every product undergoes standardized inspection procedures and 72-hour aging tests, ensuring a defect rate of less than 2%.

• One-year warranty: Provide one-year after-sales guarantee from the date of sale (excluding human damage or improper use).

• Complete accessories: The package includes the sensor, flow cell, instruction manual, certificate of conformity and 5-meter shielded cable. 100% complete, without reduction or omission.