Endress+Hauser CLS50D-BA1D21 Ultimate Guide to High-Performance Conductivity Sensors

The Endress+Hauser CLS50D-BA1D21 is a robust and highly accurate 4-electrode conductivity sensor built for precise liquid analysis in challenging process environments. As part of Endress+Hauser’s renowned Liquiline line, this sensor is engineered to deliver reliable, maintenance-friendly measurements of conductivity, resistivity, and total dissolved solids (TDS). Its advanced design ensures long-term stability and minimizes the impact of polarization and fouling, making it a cornerstone for critical process control and quality assurance.

Key Technical Parameters & Specifications

Measurement Principle: 4-electrode conductivity measurement

Cell Constant: K = 0.01 cm⁻¹ (optimized for pure and ultrapure water applications)

Measuring Ranges: 0.055 µS/cm to 2000 µS/cm (with suitable transmitter)

Process Connection: DIN 1.4435 (316L) stainless steel, DN40 PN16 flange

Process Temperature Range: -20 to 130 °C (-4 to 266 °F)

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

Electrode Material: Platinum, stainless steel 1.4435

Cable Connection: Fixed cable version (BA1D21 designation)

Certifications: Ex approvals (ATEX, IECEx) for use in hazardous areas, EHEDG certification for hygiene-sensitive processes.

Major Advantages & Benefits

The CLS50D-BA1D21 stands out due to its exceptional performance and durability:

Unrivaled Accuracy in Low Conductivity: The 4-electrode technology with a 0.01 cm⁻¹ cell constant is ideal for monitoring deionized water, RO permeate, and WFI (Water for Injection) in power and pharmaceutical industries.

Reduced Maintenance & Fouling Resistance: The electrode design compensates for coating effects, extending maintenance intervals and ensuring stable readings even in challenging media.

Robust Construction: Made with high-grade stainless steel and platinum electrodes, it withstands aggressive chemicals, high temperatures, and pressures.

Seamless Integration: Designed for use with Endress+Hauser Liquiline transmitters (e.g., CM442), it offers plug-and-play compatibility, easy calibration, and comprehensive diagnostics.

Compliance & Safety: With international explosion protection and hygienic design certifications, it meets stringent requirements for hazardous and clean-in-place (CIP) environments.

Primary Applications

This versatile sensor is critical in industries where precise conductivity measurement is non-negotiable:

Pharmaceutical & Biotechnology: Monitoring Water for Injection (WFI), purified water, and CIP processes.

Power Generation: Controlling cation conductivity and monitoring steam quality in boiler feedwater.

Chemical Processing: Measuring acid and base concentrations in reaction vessels and neutralization processes.

Food & Beverage: Ensuring water quality and controlling cleaning processes.

Water & Wastewater Treatment: Controlling reverse osmosis (RO) systems and monitoring effluent quality.

Keywords

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