Water analyzer W761-DCL2.2

chlorinesodiumozone

The Inline Residual Chlorine Analyzer is equipped with a German-made CL2.2 sensor, utilizing a coated amperometric dual-electrode system to detect only hypochlorous acid (HOCL) in water. It features automatic temperature compensation, analog/digital signal output, requires no zero calibration, and its slope loss is affected by pH. This analyzer is suitable for high-salt water, making it ideal for disinfection monitoring of drinking water, swimming pool water, and slightly polluted process/cooling water. Key features include high-salt resistance, stable dual-electrode measurement with fast response, easy operation, and compliance with environmental demands.Working PrincipleW761-DCL2.2 mainly consists of two parts: the control panel and the Germany-made CL2.2 free chlorine sensor. The controller displays the disinfectant value (main measured value), the pH value of the aqueous solution (a pH electrode is required for selection), and the working status. It outputs signals such as analog, digital, and switching signals.Detection Target: Only detects hypochlorous acid (HOCL) in water; cannot detect hypochlorite (anionic form); only applicable to inorganic chlorinating agents (chlorine gas, sodium hypochlorite, calcium hypochlorite, chlorine generated by membrane electrolysis); cannot detect organic chlorinating agents (e.g., cyanuric acid-based products).Signal Processing: Integrates a temperature sensor for automatic temperature compensation, and outputs compensated signals—analog (4~20 mA or 0~±2V) and digital (Modbus RTU, via RS485 interface).Calibration Requirements: Zero-point calibration is not required; slope calibration must be performed using the DPD-1 method (colorimetric method, DPD testing equipment needs to be purchased separately); after calibration, the pH value must remain stable (fluctuation < 0.05); otherwise, a sensor with lower pH dependence should be selected.pH Impact: The concentration ratio of hypochlorous acid (HOCL) depends on the pH value; pH changes will cause measurement slope loss (e.g., approximately 60% slope loss at pH=8, and approximately 80% at pH=8.5, with pH=7 as the reference).ApplicationCore adaptation to high-salt concentration water bodies, such as brine or seawater with a salt concentration of 3.5%~26% (conductivity > 50mS).Disinfection monitoring of drinking water and swimming pool water.Disinfection monitoring of slightly polluted process water and cooling water treatment.Must be used with a dedicated flow cell to ensure the water flow meets requirements.Product FeaturesHigh-Salt Adaptability: Specifically designed for brine/seawater with a salt concentration of 3.5%~26%, and resistant to high-salt environments.Measurement System Advantages: Dual-electrode structure improves measurement stability; fast response time (T90 ≈ 30 seconds).Easy Operation: Integrates temperature compensation, no zero-point calibration required; can be directly connected to a dedicated transmitter, supporting "one-click calibration".Environmental Requirements: Water flow must be controlled at 15~30 L/H (in the flow cell); the water to be measured must be drinking water or clean water, free of solids and surfactants (e.g., detergent components); only one type of disinfectant can be used at a time to avoid interference.Slope Characteristics: The sensor slope fluctuates depending on the manufacturer/application (65%~150% of the nominal slope); it is recommended to determine the suitable measurement range by multiplying the concentration to be measured by 1.5 (e.g., if the concentration to be measured is 1.6ppm → a measurement range of 5ppm is recommended).Technical ParametersCategoryDetailed ParametersBasic ParametersMeasuring Parameter: Free chlorine; Applicable Chlorinating Agents: Inorganic chlorine compounds (NaOCl, Ca(OCl)₂, chlorine gas, membrane electrolytic chlorine); Diaphragm-free electrolytic chlorine is prohibitedMeasurement PerformanceMeasurement Range: 0.005~2 mg/L (ppm, resolution 0.001 mg/L); 0.05~20 mg/L (ppm, resolution 0.01 mg/L); Response Time T90: Approximately 30 secondsEnvironmental ConditionsWater Temperature: 0~45℃ (no condensation); Ambient Temperature: 0~55℃; pH Operating Range: 6~8; Flow Rate: 15~30 L/H (in flow cell)pH DependenceApproximately 60% slope loss at pH=8, and approximately 80% at pH=8.5 (with pH=7 as the reference); pH fluctuation must be maintained < 0.05Signal & Power SupplyOutput Signal: 4~20mA/0~±2V (analog), Modbus RTU (digital); Power Supply Voltage: 12~30VDC (2-pin terminal), 9~30VDC (5-pin M12)Connection Method2-pin terminal (2×1mm²), 5-pin M12 aviation connectorInterfering FactorsChlorine Dioxide (ClO₂): Measured, concentration coefficient 9; Ozone (O₃): Measured; Diaphragm-free chlorine electrolysis causes interferencePhysical CharacteristicsPressure Resistance: Maximum absolute pressure 2 bar, maximum relative pressure 1 bar; Materials: Semipermeable membrane, PVC-U, ABS; Dimensions: Diameter 25mm, length 190~220mm (depending on connection method); Weight: Approximately 125gOthersPolarization Time: 1 hour; Electromagnetic Compatibility (EMC): Interference emission Class B, immunity meets industrial requirements (EN 61326-1/2-3)FAQ – Frequently Asked QuestionsProducts are designed and manufactured in China, following international quality standards and certified processes.OEM/ODM services and private labeling are available for international clients.Products comply with CE, RoHS, and other international certifications.Fast and reliable delivery via major international couriers.Product samples are available for evaluation before bulk orders.Standard products ship within 5–7 days after order confirmation; customized products may take longer.24/7 technical support, product guidance, and warranty service are provided.Remote technical assistance, English manuals, and prompt solutions for international clients.Ordering is available via email or website inquiry, with professional guidance throughout the process.Over 30 years of manufacturing experience, advanced technology, strict quality control, and global customer service.Key Specifications / Technical FeaturesModel: W761-DCL2.2Sensor: German-made CL2.2, coated amperometric dual-electrodeDetection: Hypochlorous acid (HOCL) onlyMeasurement Range: 0.005~2 mg/L (resolution 0.001 mg/L); 0.05~20 mg/L (resolution 0.01 mg/L)Response Time: T90 ≈ 30 secondsOutput: 4~20mA/0~±2V (analog), Modbus RTU (digital, RS485)Power Supply: 12~30VDC (2-pin), 9~30VDC (5-pin M12)Operating Temperature: Water 0~45℃, Ambient 0~55℃pH Range: 6~8Pressure Resistance: Max 2 bar (absolute), 1 bar (relative)Materials: Semipermeable membrane, PVC-U, ABSDimensions: Diameter 25mm, Length 190~220mmWeight: ~125g