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Analog conductivity sensor
Indumax CLS50

Analog conductivity sensor
Indumax CLS50 ©Endress+Hauser
Analog conductivity sensor
Indumax CLS50 ©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 chemical applications

Indumax CLS50 is an inductive conductivity sensor for standard, hazardous and high-temperature applications. Benefit from high chemical resistance and long durability thanks to robust materials (PFA, PEEK). Moreover, it is insensitive to soiling and performs reliable and repeatable even in harsh and aggressive media. The wide temperature range of -20 to +180 °C leaves nothing to be desired.

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  • Benefits

    • High durability and chemical resistance even under harsh conditions

    • Dirt-repellent materials and large sensor opening avoid soiling

    • Wide temperature range and highly resistant materials make the sensor suitable for virtual any application

    • Robust design...

  • Field of application

    Indumax CLS50 measures toroidal conductivity in:

    • Chemicals:
      - Concentration measurement of acids and bases
      - Quality monitoring of chemical products in tanks and pipes

    • Food & beverages:
      - Phase separation of product/product mixtures in...

Features and specifications



  • Measuring principle


  • Application

    Waste water, process

  • Characteristic

    Inductive conductivity cell made of highly resistant material for conductivity and concentration neasurements in process applications.

  • Measurement range

    2µS/cm - 2000 mS/cm

  • Measuring principle

    Inductive conductivity measurement

  • Design

    - No direct contact with the media because of the sensor coating made of highly resistant material.

  • Material

    PEEK or PFA

  • Dimension

    Electrode: outside diameter: appr. 47 mm inside diameter: appr. 15 mm

  • Process temperature

    max. 180°C (PEEK)
    (356°F)max. 125°C (PFA)

  • Process pressure

    max. 20 bar (PEEK)
    (290 psi) max. 16 bar (PFA)
    (233 psi)

  • Temperature sensor

    Integrated Pt100

  • Ex certification


  • Connection

    Process connection: NPT1", DN50, AINSI, JIScable: fixed cable connection.

  • Ingres protection


  • Additional certifications

    Calibration certification of the cell constant.

Documents / Manuals / Software

Accessories / Spare parts

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