Endress+Hauser CLS50D-AA5D21 Inductive Toroidal Conductivity Sensor

The Endress+Hauser CLS50D-AA5D21 is a premium, fully encapsulated inductive conductivity sensor designed for highly reliable measurements in harsh and fouling process environments. As part of Endress+Hauser’s innovative CLS50 series, this sensor utilizes the toroidal, or inductive, measuring principle, making it the ideal choice for applications with high conductivity, corrosive media, or where electrode fouling is a major concern. Its robust construction and sophisticated design ensure long-term stability, minimal maintenance, and accurate process control across critical industries such as chemical processing, power generation, and wastewater treatment.

Key Parameters and Technical Specifications

Measuring Principle: Inductive (Toroidal)

Model Variant: CLS50D-AA5D21 (specific material configuration)

Measuring Range: Typically 0 ~ 2000 mS/cm (dependent on transmitter)

Process Connection: 1" NPT thread

Process Temperature: Up to 200 °C (392 °F)

Process Pressure: Up to 40 bar (580 psi) at 25°C

Sensor Material: PFA (Perfluoroalkoxy) encapsulation, PP (Polypropylene) housing

Electrode Material: Standard PFA; offers excellent chemical resistance.

Certifications: Compliant with international standards for industrial use.

Key Advantages and Benefits

The CLS50D-AA5D21 stands out due to its significant operational benefits:

Fouling-Resistant Design: The fully encapsulated PFA sensing surface prevents direct contact between electrodes and the process media, eliminating problems caused by coating, scaling, or corrosion.

Minimal Maintenance: Without exposed electrodes to clean or replace, the sensor drastically reduces maintenance time and cost.

Robust and Durable: Built to withstand aggressive chemicals, high temperatures, and pressures, ensuring a long service life even in the toughest conditions.

Highly Accurate and Stable: The inductive principle provides stable and repeatable measurements over time, crucial for consistent process quality and efficiency.

Easy Integration: Compatible with Endress+Hauser’s advanced transmitters (like the Liquiline CM44x) for seamless system integration and advanced diagnostics.

Primary Applications

This sensor is engineered for challenging applications where contacting sensors fail:

Concentrated Acids & Caustics: Measurement in high-conductivity chemical processes.

Brines & Salt Solutions: Monitoring in chlor-alkali, food, or pharmaceutical production.

Power Industry: Monitoring cation and anion conductivity in boiler feedwater and steam cycles.

Wastewater & Effluent: Reliable measurement in heavily contaminated water streams.

Pulp & Paper Industry: Control in black/white liquor and other conductive process liquors.

Keywords

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