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Analog conductivity sensor
Indumax CLS54

Analog conductivity sensor
Indumax CLS54 ©Endress+Hauser
Analog conductivity sensor
Indumax CLS54 ©Endress+Hauser
Analog conductivity sensor
Indumax CLS54 ©Endress+Hauser
Analog conductivity sensor
Indumax CLS54 ©Endress+Hauser

The conductivity of a liquid can be measured using the conductive or toroidal measuring principles. This video shows what it is about and how these measuring principles work.

Toroidal conductivity sensor for hygienic and sterile applications

The Indumax CLS54 inductive conductivity sensor protects all of your products and processes that must meet the strictest hygienic and sterile demands. Its outstanding performance combined with a unique hygienic design ensures highest safety and quality of your products.

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  • Benefits

    • Unique hygienic design avoids contamination

    • With all hygienic certificates required in hygienic applications

    • Food grade virgin PEEK body without joints nor crevices

    • Certified biocompatibility according to USP class VI

    • Suitable for cleaning-in-place (CIP)...

  • Field of application

    Indumax CLS54 measures toroidal conductivity in hygienic food & beverage and life science applications, such as:

    • Phase separation of product/water and product/product mixtures in pipe systems

    • Control of CIP (cleaning in place) processes in the return...

Features and specifications



  • Measuring principle


  • Application

    Food, beverage and pharmaceutical industries and in biotechnology.

  • Characteristic

    Specifically intended for use in hygienic applications and especially suitable for following applications:
    Phase separation, control of CIP, concentration control, product monitoring, leakage monitoring.

  • Measurement range

    100 µS/cm - 2000 mS/cm Cell constant k: 6,3 1/cm

  • Measuring principle

    Inductive conductivity measurement

  • Design

    Hygienic design with food-grade virgin PEEK body in jointless and creviceless design including all hygienic certifications.

  • Material

    In contact with medium: Virgin PEEK
    Surface roughness: Ra<0.9µm

  • Process temperature

    Process temperature: -10°C - +125°C
    (14°F - 257°F)
    Sterilisation: 150°C/5 bar (max. 60 min.)
    (302°F / 72.5 psi)

  • Process pressure

    12 bar(174 psi)/20°C(68°F)
    8 bar(116 psi)/125°C(257°F)

  • Temperature sensor

    Pt1000 (class A)with a temperature response time T90 < 27s.

  • Ex certification

    ATEX II G EEx ia IIc T3/T4/T6
    FM/CSA IS NI CL.I,II,III,Div.1&2 group A-G in connection with the transmitter CM42.

  • Connection

    Dairy pipe, Aseptic-fitting, Clamp ISO 2852, SMS-2", Varivent N DN 40-125, Neumo Biocontrol D50.

  • Ingres protection


  • Additional certifications

    FDA, EHEDG, 3-A, Biological reactivity (USP class VI part 87 and 88)

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