Endress+Hauser CLS50D-BA1B21 Chlorine Sensor for Water Treatment

In the world of precise water quality analysis, the Endress+Hauser CLS50D-BA1B21 stands out as a premier amperometric sensor for continuous chlorine measurement. Engineered for reliability and accuracy, this sensor is a critical component for ensuring water safety and process efficiency across various industries. This article provides a comprehensive overview of its features, benefits, and applications.

Product Description

The Endress+Hauser CLS50D-BA1B21 is a high-performance, membrane-covered amperometric sensor specifically designed for measuring free chlorine (hypochlorous acid) in water. It operates on a robust three-electrode system, which ensures exceptional long-term stability and minimal maintenance requirements. The sensor is built to integrate seamlessly with Endress+Hauser’s Liquiline CM44x series transmitters, creating a powerful analytical system for continuous monitoring. Its primary function is to provide reliable, real-time data crucial for disinfection control in drinking water, cooling circuits, and process water.

Key Technical Parameters and Specifications

Measurement Principle: Amperometric, 3-electrode system with a gold working electrode.

Measured Variable: Free chlorine (Cl₂), primarily as hypochlorous acid (HOCI).

Measuring Ranges: Typically 0 to 5 ppm (mg/L), configurable for optimal performance.

Membrane Cap: Features a patented, puncture-resistant membrane for stable diffusion and protection of the electrodes.

Electrolyte: Gel electrolyte formulation for extended service life and reduced maintenance.

Pressure Rating: Suitable for pressures up to 6 bar.

Temperature Range: Operates reliably in a process temperature range of 0 to 50 °C (32 to 122 °F).

Output: Compatible with modern digital and analog communication protocols via Liquiline transmitters.

Key Advantages and Benefits

The CLS50D-BA1B21 offers distinct operational and economic advantages:

High Accuracy & Stability: The 3-electrode technology eliminates reference electrode polarization, providing drift-free measurements and reducing calibration frequency.

Low Maintenance: The robust membrane and gel electrolyte significantly extend operational life, lowering the total cost of ownership.

Exceptional Durability: Built with high-quality materials to withstand challenging water treatment environments.

Easy Integration & Calibration: Simple, user-friendly setup and calibration when paired with intuitive Endress+Hauser transmitters.

Reduced Consumables: Long electrolyte service life minimizes consumable usage and waste.

Primary Applications

This chlorine sensor is indispensable in applications where precise disinfection control is paramount:

Drinking Water Treatment: Monitoring chlorine levels after filtration and at the point of disinfection to ensure safe, compliant potable water.

Cooling Tower Water: Controlling biocide dosage in cooling and boiler feed water to prevent legionella and biofilm formation.

Industrial Process Water: Ensuring appropriate chlorine residuals in food & beverage, pharmaceutical, and chemical process water.

Wastewater Effluent: Verifying disinfection efficacy before discharge or reuse.

Keywords

Endress+Hauser CLS50D-BA1B21, chlorine sensor, free chlorine measurement, amperometric sensor, water quality sensor, disinfection monitoring, water treatment, Liquiline CM44x, hypochlorous acid sensor, cooling water treatment, drinking water analysis, process water monitoring, 3-electrode sensor, low-maintenance chlorine sensor.

Conclusion

The Endress+Hauser CLS50D-BA1B21 chlorine sensor represents the gold standard in reliable, low-maintenance chlorine measurement. By delivering accurate, stable data, it empowers operators to optimize disinfection processes, ensure regulatory compliance, and protect critical infrastructure. For any application requiring trusted free chlorine monitoring, the CLS50D-BA1B21 is an investment in precision, safety, and operational efficiency.