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Analog conductivity sensor
Condumax CLS15

Analog conductivity sensor
Condumax CLS15 ©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.

Conductive conductivity sensor for standard applications in pure and ultrapure water

Condumax CLS15 is the ideal choice for conductivity measurement in low measuring ranges. It performs reliably and accurately in a wide range of applications - even in hazardous areas. Designed for low maintenance and a long operating life, the sensor offers real value for money.

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  • Benefits

    • Reliable and accurate measuring values at low conductivities

    • Easy to clean thanks to polished measuring surfaces

    • Sterilizable

    • Robust design for high durability

    • Different cell constants provide a wide measuring range

    • Quality certificate stating the individual...

  • Field of application

    Condumax CLS15 measures conductivity in pure and ultrapure water applications for the monitoring and control of:

    • Ion exchangers

    • Reverse osmosis

    • Cooling water

    • Distillation

    • Chip cleaning

    The sensor can be used in power plants for:

    • Degassed conductivity

    • ...

Features and specifications



  • Measuring principle


  • Application

    Water, power plant, process

  • Characteristic

    2-electrode conductivity cell for pure and ultrapure water

  • Measurement range

    k=0,01: 0-20 µS/cm
    k=0,1: 0-200 µS/cm

  • Measuring principle

    Conductive conductivity cell with polished stainless steel electrodes

  • Design

    2-electrode conductivity sensor with coaxially arranged electrodes, electropolished

  • Material

    Electrode: 1.4435
    Electrode shaft: PES

  • Dimension

    Electrode diameter: 16 mm
    (0.62 inch)
    Electrode length: appr. 55 mm
    (2.14 inch)

  • Process temperature

    max. 130°C (150°C / 30 min.)
    (max. 266°F (302°F/30 min.)

  • Process pressure

    max. 12 bar at 20°C
    (174 psi at 68°F)

  • Temperature sensor


  • Ex certification


  • Connection

    Process connection: 1/2" NPT, 3/4" NPT, 1 1/2" Clamp
    cable : 4-pole SXP connector or fixed cable

  • Ingres protection


  • Additional certifications

    Calibration certification of the cell constante.

Documents / Manuals / Software

Accessories / Spare parts

Order code
    • Order code 51500076

      cable connector 4 pole PG9

    • Order code 50066536

      PVC-Threaded coupling G 1/2"

      for cementing in cross / T-pieces DN 20

    • Order code 50004381

      PVDF Adapter G 1/2" - G 1"

      for mounting of sensors with thread NPT 1/2".

    • Order code 50004738

      AM 32 equalizing sleeve DN32, PVC

      for conductivity cell installation into T-90-piece or cross piece DN 32

    • Order code 50004739

      AM 40 equalizing sleeve DN40, PVC

      For conductivity cell installation into T-90-piece or cross piece DN40

    • Order code 50004740

      AM 50 equalizing sleeve DN50, PVC

      For conductivity cell installation into T-90-piece or cross piece DN50