Endress+Hauser CLS21-C1N2A Advanced Conductivity Sensor

The Endress+Hauser CLS21-C1N2A is a high-performance, two-electrode conductivity sensor designed for precise measurement in a wide range of industrial processes. Engineered with Endress+Hauser's renowned expertise in liquid analysis, this sensor delivers reliable, accurate, and maintenance-friendly operation in applications from ultrapure water to concentrated solutions. Its robust construction and advanced features make it an ideal choice for the pharmaceutical, chemical, power, and food & beverage industries.

Key Technical Parameters

Measurement Principle: 2-Electrode Conductivity

Cell Constant: Certified (e.g., 0.01, 0.1, 1.0 cm⁻¹ options available – specific value depends on variant)

Measuring Range: Covers ranges from ultrapure water to high-conductivity media (exact range dependent on cell constant and transmitter).

Process Temperature: Up to 130°C (266°F)

Process Pressure: Up to 16 bar (232 psi) at 130°C

Electrode Material: Pt1000 temperature sensor; electrode material typically stainless steel 1.4435 (316L) or other alloys for corrosion resistance.

Connection: Various process connections (e.g., NPT, G½") and cable lengths available.

Certifications: Complies with international standards, suitable for use in hygienic and demanding industrial environments.

Core Advantages & Benefits

1. Unmatched Accuracy and Stability:

The CLS21-C1N2A features a certified cell constant and integrated Pt1000 temperature sensor for precise temperature compensation. This ensures highly accurate measurements over long periods, critical for process control and quality assurance.

2. Exceptional Durability and Hygiene:

Constructed with high-quality materials like 316L stainless steel, the sensor resists corrosion and chemical attack. Its smooth surfaces and cleanable design make it perfect for hygienic applications (CIP/SIP compatible variants available), reducing contamination risk.

3. Simplified Operation and Maintenance:

"Plug and Measure" functionality with Memosens technology ensures digital, contactless data transmission. This eliminates moisture issues, enables predictive maintenance through sensor diagnostics stored in the digital chip, and allows for easy pre-calibration in the lab.

4. Versatile Application Fit:

With a selection of cell constants and robust design, the CLS21 adapts to diverse media—from monitoring ion exchange and reverse osmosis to controlling concentration and cleaning processes.

5. Seamless Integration:

The sensor pairs perfectly with Endress+Hauser transmitters like the Liquiline CM44x series, creating a powerful, intuitive measurement loop with extensive diagnostic and communication capabilities (e.g., 4-20 mA, HART, PROFIBUS, Foundation Fieldbus).

Conclusion

The Endress+Hauser CLS21-C1N2A conductivity sensor sets the standard for reliable liquid analysis. It combines precision, ruggedness, and smart digital features to minimize downtime and optimize process efficiency. By choosing this sensor, industries achieve greater control, reduced lifecycle costs, and enhanced product quality.