Residual Chlorine / Chlorine Dioxide Sensor for Online Water Disinfection Monitoring
Instrava residual chlorine and chlorine dioxide sensor is designed for accurate and stable online measurement in drinking water and industrial water treatment applications. Based on Swiss membrane-covered amperometric technology, the sensor provides fast response, high precision, and long-term stable operation without the use of reagents.
Key Benefits
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Swiss membrane-covered amperometric sensor technology
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Measures residual chlorine (HOCl) and chlorine dioxide (ClO₂)
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Reagent-free operation with low maintenance requirements
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Stable measurement independent of flow and pressure changes
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Suitable for standard, customized, and OEM integration
Transmitters & Sensors Description
Why Choose This Sensor for Disinfection Monitoring
In water disinfection processes, inaccurate residual chlorine or chlorine dioxide measurement can lead to insufficient sterilization or excessive chemical dosing. This sensor is designed to address these challenges by providing stable, precise, and reliable measurements under real operating conditions.
For water utilities, system integrators, and OEM manufacturers, the sensor offers:
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High measurement accuracy even at low concentration levels
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Fast response time for real-time process control
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Reduced operational costs due to low maintenance and reagent-free design
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Long-term continuous operation with minimal intervention
Residual Chlorine/chlorine Dioxide Sensor Measurement Technology & Performance
The sensor adopts a Swiss membrane-covered amperometric measurement principle with a three-electrode system, ensuring high selectivity and stable signal output. Integrated Pt1000 temperature sensing enables automatic temperature compensation, while pH compensation further improves measurement accuracy in varying water conditions.
A dedicated flow cell design ensures that measurement results are not affected by changes in flow velocity or pressure, making the sensor suitable for continuous online monitoring.
Technical Advantages
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Three-electrode amperometric measurement system
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Automatic temperature compensation via Pt1000 sensor
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pH-compensated measurement for improved accuracy
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Fast response time of less than 30 seconds after polarization
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Designed for long-term continuous operation
Transmitters & Sensors Parameter
Measured Parameters
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Residual chlorine (HOCl)
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Chlorine dioxide (ClO₂)
Measurement Range
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0–5 mg/L
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0–20 mg/L
Accuracy
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±2%
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±0.03 ppm at pH 7 (drinking water)
Response Time
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<30 s after polarization
pH Range
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5–9 pH
Conductivity Requirement
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≥100 μS/cm
Sample Flow Velocity
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≥0.03 m/s (in flow cell)
Maximum Pressure
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1.0 MPa
Dimensions
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Ø21.5 × 133 mm
Process Connection
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3/4 NPT
Cable Length
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3 m
Ingress Protection
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IP65
Instrava OEM/ODM
Tailored Sourcing & Customization: Getting You the Exact Product You Need
As your trusted supplier and sourcing partner, we bridge the gap between your custom requirements and China’s vast manufacturing capabilities.
Finding the right product in a massive supply chain can be challenging. That is where we step in.
As a curated industrial supplier, our core value is simple: we stand in your shoes to help you procure the most optimal products. Whether you are an EPC contractor needing specialized technical compliance, an OEM equipment manufacturer looking for custom branding, or an industrial distributor/trader seeking competitive edge, we customize and tailor products to fit your exact procurement needs.
How We Customize to Fit Your Procurement Needs
For EPC Contractors & Engineers: We custom-configure instruments and devices to match your precise datasheets—tailoring process connections, exotic materials, signal protocols, and managing third-party calibration and testing so you get project-ready solutions.
For OEM Equipment Manufacturers: We provide comprehensive OEM/ODM customization, including custom housing, labeling, branding (private labeling), and tailored technical specifications to seamlessly integrate with your machinery.
For Industrial Distributors & Traders: We offer flexible customization in packaging, product ranges, and technical parameters, helping you differentiate your portfolio and win more local bids.
Why Partner with Us for Custom Sourcing?
One-Stop Engineering Alignment: You don’t have to deal with multiple factories. We translate your technical requirements into precise manufacturer blueprints.
Strict Quality & Compliance Safeguard: We oversee the entire customization and production process in China, ensuring the final customized product meets your local standards and certifications.
Our Ultimate Value: We don’t just sell what’s on the shelf. We find, customize, and deliver the most suitable and cost-effective product for your unique application.
What disinfectants can this sensor measure?
This sensor is designed to measure residual chlorine (HOCl) and chlorine dioxide (ClO₂), making it suitable for common disinfection processes in drinking water and industrial water treatment systems.
How does the sensor maintain accuracy under changing water conditions?
The sensor uses a membrane-covered amperometric principle with a three-electrode system, combined with automatic temperature compensation and pH compensation to ensure stable and accurate measurements under varying conditions.
Is the measurement affected by flow rate or pressure changes?
No. The sensor is used with a dedicated flow cell, which isolates the measurement from variations in flow velocity and pressure, ensuring consistent and reliable readings during continuous operation.
Does the sensor require chemical reagents or frequent maintenance?
The sensor operates without chemical reagents and is designed for long-term use. Under normal conditions, it can operate continuously for at least nine months without maintenance, reducing operating costs.
How fast does the sensor respond to concentration changes?
After polarization is completed, the sensor responds to changes in disinfectant concentration in less than 30 seconds, making it suitable for real-time monitoring and control applications.
Can this sensor be integrated into OEM or automated monitoring systems?
Yes. Instrava provides OEM and customization support, allowing the sensor to be integrated into analyzers, control panels, and automated water monitoring systems with engineering assistance throughout the project.
Why Trust Instrava?
We select manufacturers from a neutral, impartial standpoint, always with your best interests in mind.
Our very existence depends on helping you source the products that are the perfect fit for your needs.
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Instrava relies entirely on trust; it is our core philosophy and the foundation of our existence in society. It is the fundamental basis for our long-term growth and our commitment to serving the community.
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