Online Residual Chlorine Analyzer
The Residual Chlorine Analyzer is a specialized instrument for detecting residual chlorine concentration in water. It is widely used in water plants, ...
Key Features
Performance Metrics
| Electrical Interface | PG9 waterproof cable gland |
| Measurement Accuracy | Better than ±1% or ±0.01mg/L (whichever is greater) |
| Protection Rating | IP43 |
| Temperature Compensation | NTC10K |
Key Features
Online Residual Chlorine Analyzer
The Online Residual Chlorine Analyzer is an essential automated analytical device designed for real-time, continuous monitoring of residual chlorine content in various water bodies. This instrument is crucial for ensuring water quality compliance and effective disinfection control across multiple industries.
Core Working Principles of the Analyzer
The analyzer employs several advanced detection methods to ensure accurate measurement. The Constant Voltage Method (Membrane/Polarographic Method) uses a sensor with a working and reference electrode to generate a current proportional to chlorine concentration.
For high-precision applications, the DPD Spectrophotometric Method periodically draws a sample, reacts it with DPD reagent, and measures the absorbance of the resulting colored compound. Some models also utilize a Reagent-Free Colorimetric Method based on UV light absorption characteristics.
Key Features & Advantages
Real-time Monitoring
Capable of 24/7 uninterrupted monitoring with rapid response to capture concentration changes promptly.
High Detection Accuracy
Utilizes high-precision principles, controlling deviation within ±2% FS with a detection limit of 0.01mg/L.
Intelligent Operation
Microcomputer control supports touch operation, automatic zeroing, and 1-5 point automatic calibration.
Multi-parameter Monitoring
Online models can simultaneously measure residual chlorine and temperature; some also support pH detection.
High Stability
Built-in watchdog function and isolated current output ensure continuous, stable operation with strong anti-interference.
Long-life Components
Employs semiconductor light emitters with a lifespan of tens of thousands of hours, far exceeding traditional lamps.
Structural Composition & System Design
The core of the system is the sensor module, which includes the primary residual chlorine sensor and auxiliary sensors for pH, temperature, and turbidity to correct measurement data. The signal is processed by a dedicated transmitter and analog-to-digital converter (ADC).
A Central Processing Unit (CPU) runs embedded software for data acquisition and processing, supported by a storage module for historical data. The intelligent control module can trigger alarms or linkage controls based on set thresholds via multiple output interfaces.
User interaction is facilitated through a Human-Machine Interface (HMI), typically an LCD or OLED display with buttons or a touchscreen. The entire system is powered by a stable supply with protection features and housed in a dustproof and waterproof enclosure.
Technical Specifications & Data Functions
| Parameter | Specification / Capability |
|---|---|
| Detection Principle | Constant Voltage (Polarographic), DPD Spectrophotometry, UV Colorimetry |
| Measurement Accuracy | Deviation within ±2% of full scale |
| Detection Limit | 0.01 mg/L |
| Light Source Lifespan | Tens of thousands of hours (Semiconductor emitter) |
| Multi-parameter Support | Residual Chlorine, Temperature, (optional pH) |
| Data Storage & Interface | Stores curves & data, USB interface for export, Isolated current output |
| Display & Operation | HD LCD, Chinese/English interface, Touch keypad/Menu, Auto-calibration |
Primary Application Fields for Water Quality Monitoring
This analyzer is widely used for disinfection process control in water treatment plants and for monitoring disinfection efficacy in wastewater treatment plant effluent. It is essential for verifying disinfection effectiveness in food & beverage production water.
Other critical applications include controlling disinfection in industrial circulating water systems and ensuring water quality compliance in the pharmaceutical industry. Its primary role is to prevent microbial growth by maintaining optimal residual chlorine levels.
Installation, Operation & Maintenance
Proper Installation Guidelines
For accurate readings, the analyzer should be installed away from strong electromagnetic interference sources. A filter must be installed before the sample inlet to protect the sensor.
For pipeline installation, ensure the pipe is completely full of water. For wall-mounted units, the typical recommended installation height is between 1.2 to 1.5 meters for easy access and operation.
Routine Maintenance Procedures
New equipment requires an initial polarization process upon first use. For daily operation, regular calibration with standard solution is necessary to maintain measurement accuracy.
The electrode should be cleaned every 3 to 6 months, depending on water quality. The intuitive HMI and simple maintenance procedures make the analyzer user-friendly and operable without the constant need for specialized personnel.
Functional Expandability & System Integration
The Online Residual Chlorine Analyzer supports multiple signal outputs (4-20mA, RS485, etc.) for seamless integration with broader water quality monitoring platforms and automated chemical dosing systems. This expandability significantly enhances the intelligence level of modern water quality management.
Embedded software handles local data processing, while optional cloud platform connectivity enables powerful remote monitoring and control capabilities, making it a cornerstone of industrial water treatment automation.
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