Endress+Hauser CPS91E-AA7BHH2–Advanced Conductivity Sensor

The Endress+Hauser CPS91E-AA7BHH2 is a premium, four-electrode conductivity sensor designed for precise and reliable measurement in demanding industrial water and process applications. Engineered with Endress+Hauser's renowned expertise in liquid analysis, this sensor provides exceptional long-term stability, minimal maintenance requirements, and robust performance in harsh conditions. It is the ideal solution for monitoring water quality, controlling concentration levels, and ensuring process efficiency in industries such as pharmaceuticals, power generation, chemical processing, and wastewater treatment.

Key Technical Parameters

Measurement Principle: Four-electrode conductivity (inductive)

Model: CPS91E-AA7BHH2

Measuring Range: 0...2000 mS/cm (configurable)

Process Temperature: -20...130 °C

Process Pressure: Up to 16 bar (232 psi) at 25°C

Cell Constant: User-selectable (e.g., 0.01, 0.1, 1.0 cm⁻¹)

Electrode Material: Stainless steel 1.4435 (316L)

Process Connection: Immersion version with 1" NPT thread

Cable Length: Integral cable (length specified by model variant)

Output: Compatible with Endress+Hauser transmitters (e.g., CPM153, Liquiline CM44x) via digital communication.

Certifications: EHEDG, 3-A, FDA compliant materials.

Core Advantages and Benefits

1. Unmatched Accuracy and Stability:

The four-electrode technology eliminates polarization effects, ensuring highly accurate readings even in media with high conductivity or fouling tendencies. This leads to superior process control, consistent product quality, and reduced chemical consumption.

2. Exceptional Durability and Reduced Maintenance:

Constructed with high-grade stainless steel and featuring a robust design, the CPS91E-AA7BHH2 withstands corrosive environments, high pressures, and temperature fluctuations. Its fouling-resistant geometry minimizes buildup, drastically cutting maintenance time and operational costs.

3. Versatile and Easy Integration:

With a wide measuring range and selectable cell constants, this single sensor can be adapted for various applications, from ultrapure water to concentrated acids or brines. Its seamless compatibility with Endress+Hauser's digital transmitters enables plug-and-measure setup, advanced diagnostics, and seamless integration into control systems.

4. Smart Diagnostics and Future-Proofing:

When paired with a compatible Liquiline transmitter, the sensor enables predictive maintenance. It provides diagnostic information on sensor health, coating, and process conditions, helping prevent unexpected downtime and optimizing plant efficiency.

Ideal Applications

Monitoring of RO (Reverse Osmosis) and DI (Deionized) water purity

Concentration measurement of acids, alkalis, and salts

Clean-in-Place (CIP) control in food & beverage and pharmaceutical industries

Cooling water and blowdown conductivity monitoring in power plants

Effluent quality control in wastewater treatment plants

Conclusion

The Endress+Hauser CPS91E-AA7BHH2 conductivity sensor sets the standard for reliable, low-maintenance, and precise process analysis. By combining robust hardware with intelligent digital capabilities, it delivers critical data to optimize your operations, ensure compliance, and maximize productivity. For demanding conductivity measurement tasks, the CPS91E is the trusted, high-performance choice.

Keywords: Endress+Hauser CPS91E-AA7BHH2, conductivity sensor, four-electrode conductivity, process analyzer, water quality sensor, liquid analysis, industrial sensor, CPM153, Liquiline, conductivity measurement, pH/conductivity, process control.