Product Description

Yexsensor brand YEX-iCL-306 online residual chlorine sensor adopts advanced potentiostatic measurement principle and is specially designed for drinking water, swimming pool and industrial circulating water monitoring. The product supports RS485 Modbus protocol, comes with temperature compensation and a matching flow cell, with accurate and stable measurement, without the need for frequent replacement of membranes and reagents.

Real-time Protection of Water Quality Safety: YEX-iCL-306 Digital Online Residual Chlorine Sensor

In the fields of drinking water safety, industrial circulating water treatment and public health monitoring, precise control of residual chlorine (Residual Chlorine) is the key to ensuring sterilization effect and avoiding excessive by-products. Yexsensor's YEX-iCL-306 online residual chlorine sensor adopts industrial-grade potentiostatic measurement technology, aiming to provide global water treatment engineers and system integrators with a stable, accurate and low-maintenance digital monitoring solution.

Excellent Technology: Measurement Innovation Brought by Potentiostatic Method

Different from traditional colorimetric methods (which consume reagents) or membrane electrodes (which require frequent membrane replacement), YEX-iCL-306 adopts the potentiostatic measurement principle.

This technology maintains a constant potential between the measuring electrode and the reference electrode, allowing hypochlorous acid (HClO) in the water to undergo electrochemical reaction on the electrode surface. The current intensity generated by the reaction is directly proportional to the concentration of residual chlorine in the aqueous solution. This measurement method has significant advantages such as fast response speed, no need to replace reagents, and extremely small maintenance workload, and is particularly suitable for harsh working conditions that require long-term and continuous online monitoring.

Core Competitive Advantages of YEX-iCL-306

• High-resolution measurement: With extremely high resolution of 0.001 mg/L, it can capture trace residual chlorine fluctuations in water and ensure strict compliance with effluent indicators.

• Digital intelligent output: Built-in standard RS-485 digital interface, supporting Modbus-RTU protocol, can be directly connected to PLC, touch screen or remote IoT gateway to achieve real-time data upload and remote linkage.

• No consumables and low maintenance: The potentiostatic principle does not require replacement of electrolyte, membrane or chemical reagents, greatly reducing labor and material investment in later operation.

• Full automatic temperature compensation: Integrated high-precision Pt1000 temperature sensor, real-time correction of the influence of temperature on electrochemical reaction, ensuring reading consistency in 5～50℃ environment.

• Supporting flow installation: A dedicated flow cell is included as standard, optimizing the water flow field to ensure that the sensor measuring end is always in a stable and representative flow velocity environment, making measurement accuracy more reliable.

• Industrial-grade solid construction: Using POM corrosion-resistant shell and IP68 protection level, it can resist humid and general chemical corrosion environments.

Core Technical Parameters and Specifications of YEX-iCL-306 Online Residual Chlorine Sensor

In-depth Application Scenario Analysis of YEX-iCL-306 Online Residual Chlorine Sensor: Multi-dimensional Water Quality Assurance

The design of YEX-iCL-306 fully considers the actual working conditions of B2B users and is suitable for the following typical applications:

1. Urban water supply and pipe network monitoring
At the outlet of drinking water plants and distribution points of pipe networks, real-time monitoring of residual chlorine content is the last line of defense to prevent bacterial growth. The high sensitivity of YEX-iCL-306 can ensure that water quality meets national drinking water standards and provide accurate feedback signals for automatic chlorination systems.

2. Swimming pool and water park water quality control
Too low residual chlorine in swimming pool water will lead to sterilization failure, while too high will irritate tourists' skin. Through the digital residual chlorine sensor, the management can achieve 24-hour uninterrupted monitoring and automatically adjust the dosage of disinfectant according to the flow of people.

3. Industrial cooling circulating water
In industrial cooling towers and heat exchange systems, residual chlorine is used to inhibit the growth of algae and biological scale. YEX-iCL-306 can withstand long-term operation in industrial environments and effectively prevent the decline of heat exchange efficiency and equipment corrosion.

4. Food and beverage filling workshop
The food industry has extremely high requirements for production water. This sensor can be installed in the pre-treatment section before filling to ensure that the residual chlorine in cleaning water and process water is controlled within a safe process range, protecting product flavor and quality.

Professional Installation Guide and Maintenance Suggestions for YEX-iCL-306 Online Residual Chlorine Sensor

Installation Logic and Water Flow Control

Residual chlorine measurement has certain sensitivity to flow velocity. YEX-iCL-306 must be used with the flow cell included with the product:

• Flow rate suggestion: Please control the flow rate between 30-60 L/h. Too low flow rate will cause slow reaction, too high may cause pressure fluctuations.

• Position requirements: The sensor measuring end should be close to the water inlet to avoid the influence of turbulence generated by the water outlet.

• Sealing: The sensor and the flow cell are connected through 1/2 NPT thread, and must be installed tightly without dripping.

Electrical Wiring Specifications

Adopt 4-core twisted-pair shielded wire to ensure anti-electromagnetic interference during long-distance transmission:

• Red (VCC): 12～24V DC power positive pole.

• Black (GND): Power ground and signal ground.

• Blue (485A): RS-485 communication A signal.

• White (485B): RS-485 communication B signal.

Special Tip: If the cable joints are exposed to air or water, professional waterproof sealing treatment must be carried out.

Maintenance and Care Schedule for YEX-iCL-306 Online Residual Chlorine Sensor

• Electrode activation: For new electrodes or electrodes stored for a long time, please soak them in tap water for 24 hours for activation before use.

• Regular cleaning: According to the degree of water pollution (such as attached biofilm), regularly remove the sensor and rinse with clean water. It is strictly forbidden to use rough cloth to scratch the electrode surface.

• Calibration frequency: The sensor has been calibrated before leaving the factory. If the on-site operating environment is complex, it is recommended to use a DPD handheld analyzer for numerical comparison every month, and perform slope calibration if necessary.

FAQ

Q1: Can YEX-iCL-306 measure total chlorine?

A1: This sensor mainly measures hypochlorous acid (HClO) in water, which is the main component of free residual chlorine. In an environment with stable pH value, it can very well represent the residual chlorine level. If the water contains a large amount of chloramine, a total chlorine monitoring solution is required.

Q2: Why does this sensor must use a flow cell? Can it be directly inserted into the water tank?

A2: The potentiostatic sensor has requirements for the stability of the flow field on the electrode surface. The flow cell can provide a constant water pressure and flow velocity environment to ensure the stability of the measurement current. Direct insertion into the water tank may cause frequent jumps in values due to disordered water flow.

Q3: Is there any requirement for pH value during measurement?

A3: Yes. The potentiostatic method is greatly affected by pH fluctuations. It is recommended that the pH value of the water body be maintained between 4～9. If the pH fluctuates sharply (such as exceeding 0.5 units), it is recommended to integrate a pH sensor in the system for linkage compensation or perform pressure stabilization pretreatment on the water sample.

Q4: What should I do if scaling occurs on the electrode surface?

A4: If the water hardness is high, calcium and magnesium scaling may occur on the electrode surface. You can soak the measuring end in 1% dilute hydrochloric acid for a short time (about 1-2 minutes), and then rinse it with clean water. Remember not to scratch with fingernails or hard objects.

Q5: The value returned by the sensor is always 0.000, what may be the reason?

A5: Please first check whether the residual chlorine standard solution or water sample actually contains residual chlorine (can be tested with reagents); secondly, check whether the sensor has been fully activated; finally, confirm whether the RS485 communication is normal and whether the address code matches.

Q6: What is its response time?

A6: The T90 response time of YEX-iCL-306 is less than 90 seconds. This means that when sudden changes in water quality occur, the sensor can reflect 90% of the change trend within 1.5 minutes, which is very suitable for automatic dosing control systems.

Q7: Can I prepare the calibration solution myself?

A7: Yes, but residual chlorine standard solution is extremely unstable and volatile. We recommend that non-professional laboratory personnel give priority to the "on-site water sample comparison method": that is, while the sensor is running, use the national standard colorimetric method to measure the real-time water sample at the same time, and correct the slope of the sensor according to the measured value.

Q8: Can this sensor be used in seawater?

A8: YEX-iCL-306 has IP68 protection level and POM corrosion-resistant material, and can be used for monitoring chlorinated seawater. However, please note that the complex composition of seawater may shorten the activation cycle, and it is recommended to shorten the maintenance and cleaning interval.

Quality Assurance and After-sales Commitment

Yexsensor brand always takes "engineering-grade reliability" as the core.

Factory quality inspection: Each YEX-iCL-306 has undergone strict 72-hour aging test and three-point slope verification to ensure 100% factory qualification rate.

Return and exchange guarantee: If the non-conformity rate of the product batch reaches 2%, we promise to return and exchange unconditionally and bear all logistics and testing costs.

After-sales support: Provide one-year quality assurance from the date of sale. Our technical team can provide you with remote communication protocol debugging and installation guidance at any time.

Packing List

• YEX-iCL-306 sensor (1 pc)

• Special flow cell (1 pc)

• 5-meter standard shielded cable (1 pc)

• Product manual and certificate of conformity (1 set)