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Digital conductivity sensor
Memosens CLS21E

Memosens CLS21E - Robust conductivity sensor for medium conductivities ©Endress+Hauser
Memosens CLS21E - Robust conductivity sensor for surface water and drinking water monitoring ©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.

Memosens 2.0 contacting conductivity sensor for surface and drinking water monitoring

Memosens CLS21E is a robust conductivity sensor for all water applications with medium conductivities. It provides you with precise and reliable measured values for optimum quality monitoring. The sensor is corrosion-free and features high mechanical stability ensuring a long operating life. Thanks to Memosens 2.0 digital technology, CLS21E combines maximum process and data integrity with simple operation. It facilitates predictive maintenance and provides the perfect basis for IIoT services.

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Handle your core processes easily

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  • Specs at a glance

    • Measurement range

      k=1: 10 µS/cm to 20 mS/cm

    • Process temperature

      -20 to 135 °C at 3.5 bar abs
      (-4 to 275 °F at 50 psi)

    • Process pressure

      17 bar abs at 20 °C
      (246 psi at 68 °F)

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  • Benefits

    • Reliable and accurate measured values at medium conductivities ensure precise monitoring of water quality.

    • Robust design for long durability and low maintenance: The sensor is corrosion-free and features high mechanical and chemical stability.

    • Quality...

  • Field of application

    Memosens CLS21E measures conductivity in all water applications, such as:

    • Potable water treatment

    • Desalination plants

    • Industrial water treatment

    • River/lake monitoring

    With its international explosion protection approvals, such as ATEX, FM, CSA and...

Features and specifications

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Details

  • Measuring principle

    Conductive

  • Application

    Surface water + water

    Waste water

    Process industry

    Media separation

    Industrial water

  • Characteristic

    Digital 2-electrode conductivity sensor

  • Measurement range

    k=1: 10 µS/cm to 20 mS/cm

  • Measuring principle

    Conductive conductivity cell with graphite electrodes

  • Design

    2-electrode conductivity cell with parallel arranged electrodes

  • Material

    Sensor shaft: PES
    Electrodes: graphite

  • Dimension

    Diameter: 24 mm (0.94 inch)
    Length: 61 mm (2.40 inch)

  • Process temperature

    -20 to 135 °C at 3.5 bar abs
    (-4 to 275 °F at 50 psi)

  • Process pressure

    17 bar abs at 20 °C
    (246 psi at 68 °F)

  • Temperature sensor

    Pt1000

  • Ex certification

    ATEX, CSA, NEPSI, EAC Ex, IECEx, INMETRO

  • Connection

    Process connection: DN25, DN40, G1, NPT 1"
    Sensor connection: Inductive, digital connection head with Memosens 2.0 technology

  • Ingres protection

    IP68

Documents / Manuals / Software

Accessories / Spare parts

Nr
Order code
Specification
    • Order code 50081902

      Calibration solution CLY11-A, 74,0 uS/cm

      500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO

    • Order code 50081903

      Calibration solution CLY11-B,149,6 uS/cm

      500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO.

    • Order code 50081904

      Calibration solution CLY11-C,1,406mS/cm

      500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO

    • Order code 50081905

      Calibration solution CLY11-D,12,64 mS/cm

      500 ml, reference temperature 25oC. Precision solution referred to SRM to NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO

    • Order code 50081906

      Calibration solution CLY11-E,107,00mS/cm

      500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO

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