E+H Smartec CLD134 Toroidal Inductive Conductivity System

Reliable Inductive Conductivity Measurement for Hygienic Processes

The Endress+Hauser Smartec CLD134 is an integrated toroidal inductive conductivity measuring system engineered specifically for hygienic and sterile industrial applications. Combining a high-precision toroidal conductivity sensor and an intuitive transmitter in a single compact assembly or remote setup, the CLD134 measures inductive conductivity and chemical concentration in liquid process media. It is widely relied upon in dairies, breweries, pharmaceutical plants, and biotechnology facilities for continuous process monitoring and automated quality assurance.

Sanitary Design and Compliance for Food & Life Sciences

Built to meet the stringent contamination standards of the food, beverage, and pharmaceutical industries, the Smartec CLD134 features a smooth, sealless sensor body made of FDA-listed virgin PEEK material. The crevice-free, hygienic design prevents media entrapment and recontamination inside process pipelines. The unit complies with EU Regulation 1935/2004, European Hygienic Engineering & Design Group (EHEDG) guidelines, 3-A sanitary standards, and USP Class VI biological reactivity tests, making it fully suitable for Clean-in-Place (CIP) and Sterilization-in-Place (SIP) thermal regimes.

Optimized CIP Control and Rapid Phase Separation

In automated CIP cleaning loops and filling lines, fast measurement response is critical to minimizing product loss and water consumption. The CLD134 incorporates an integral Pt1000 temperature sensor offering an exceptional response time ($t_{90} < 26\text{ s}$). This ultra-fast response allows process automation systems to detect phase transitions instantaneously—such as switches between cleaning chemical solutions, rinsing water, and actual product—maximizing plant throughput and chemical concentration accuracy.

Robust Inductive Principle and DCS/PLC Integration

Unlike traditional conductive sensors that suffer from electrode polarization and coating buildup, the toroidal inductive principle of the CLD134 transmits an alternating magnetic field through the process liquid. This electrode-free design ensures maintenance-free operation and long-term stability in highly concentrated acid or caustic cleaning agents. Operating on standard industrial power options, the CLD134 delivers 0/4 to 20 mA analog outputs and supports digital communication protocols such as HART and PROFIBUS for seamless connection to Distributed Control Systems (DCS) and Programmable Logic Controllers (PLCs).

Application

• Food & Beverage Processing: Automated phase separation between product, rinse water, and cleaning solutions in piping systems and bottling lines.

• CIP Return & Concentration Control: Measuring acid and caustic concentration levels in CIP return channels and chemical re-making tanks.

• Pharmaceutical & Biotechnology: Media monitoring, buffer solution concentration checking, and leak detection in sterile process lines.

• Dairies & Breweries: Milk line phase separation, wort monitoring, and caustic wash concentration control.

Technical Parameters

• Measuring Principle: Toroidal / Inductive conductivity measurement

• Measuring Range: 100 µS/cm to 2000 mS/cm (Cell constant $k = 6.3\text{ cm}^{-1}$)

• Wetted Material: Virgin PEEK (FDA compliant, USP Class VI certified)

• Process Temperature: Continuous up to +125 °C (+257 °F); short-term sterilization up to +150 °C (+302 °F) for max. 60 minutes

• Process Pressure Limit: Up to 12 bar abs at +90 °C (174 psi abs at +194 °F)

• Temperature Sensor: Built-in Pt1000 ($t_{90} < 26\text{ s}$)

• Signal Output / Communication: 0/4 to 20 mA (galvanically isolated), HART, PROFIBUS DP / PA

• Process Connections: Dairy fitting (DIN 11851), Aseptic fitting (DIN 11864-1), Clamp (ISO 2852), SMS 2″, Varivent N, Neumo BioControl

• Ingress Protection: IP67 / NEMA 4X

• Certificates & Approvals: EHEDG, 3-A, FDA CFR 21, EG 1935/2004, USP Class VI

FAQ

• Q: What are the main applications of the Smartec CLD134 conductivity system?

  A: It is primarily used for CIP return line monitoring, phase separation between cleaning chemicals and product, concentration control of CIP solutions, and line leak detection in food and pharmaceutical plants.

• Q: Does the CLD134 sensor body comply with food safety standards?

  A: Yes, all wetted sensor parts are made from virgin PEEK that meets FDA CFR 21, EU 1935/2004, 3-A, and EHEDG sanitary standards.

• Q: Can the CLD134 withstand steam sterilization cycles in hygienic lines?

  A: Yes, it is fully suitable for CIP/SIP processes and withstands continuous temperatures up to +125 °C and short-term steam sterilization up to +150 °C for up to 60 minutes.

• Q: Do you supply genuine Endress+Hauser units with factory certificates?

  A: Yes, as an international instrument distributor, we supply authentic Endress+Hauser Smartec CLD134 units complete with original technical documentation, calibration reports, and manufacturer certificates upon request.

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