Enter at least 2 characters to start the search.

Digital conductivity sensor
Condumax CLS15D

Digital conductivity sensor
Condumax CLS15D ©Endress+Hauser
Digital conductivity sensor
Condumax CLS15D ©Endress+Hauser
Digital conductivity sensor
Condumax CLS15D ©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 converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection. This video shows how Memosens optimizes process control and maintenance.

Memosens conductive conductivity sensor for standard applications in pure and ultrapure water

Condumax CLS15D is the digital solution for conductivity measurement in the 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 best value for money. With Memosens digital technology, CLS15D combines maximum process and data integrity with simple operation. It resists corrosion and moisture, enables lab calibration, and facilitates predictive maintenance.

Quick selection

Choose from our suggested options
  • <%label%>
  • <%feature%>
  • Process Connection
  • <%message%>


Individual configuration

Continue your selection from all possible options
  • Benefits

    • Reliable and accurate measuring values at low conductivities

    • Easy to clean thanks to polished measuring surfaces

    • Sterilizable and autoclavable

    • Quality certificate stating the individual cell constant

    • Logging of sensor-specific data for easy traceability and...

  • Field of application

    Condumax CLS15D measures conductivity in pure and ultrapure water applications for the monitoring and control of:

    • Ion exchangers

    • Reverse osmosis

    • Cooling water

    • Distillation

    • Chip cleaning

    The digital sensor can be used in power plants for:

    • Degassed...

Features and specifications



  • Measuring principle


  • Application

    Measurement in pure and ultrapure water range, monitoring of ion exchangers, reverse osmosis, distillation, chip cleaning

  • Characteristic

    Analog or digital 2-electrode conductivity sensors

  • Measurement range

    k=0,01: 0.04 to 20 µS/cm
    k=0,1: 0.10 to 200 µS/cm

  • Measuring principle

    Conductive conductivity cell with polished stainless steel electrodes

  • Design

    2-electrode conductivity cell with coaxially arranged electrodes, electropolished

  • Material

    Electrode: stainless steel 1.4435
    Electrode shaft: PES

  • Dimension

    Electrode diameter: 16 mm (0.63 inch)
    Electrode length: appr. 55 mm (2.17 inch)

  • Process temperature

    Threaded with fixed cable:
    -20 to 100 °C (-4 to 212 °F)
    Threaded with plug-in head:
    -20 to 120 °C (-4 to 248 °F)
    Sterilization: max. 140 °C (284 °F) for 30 minutes

  • Process pressure

    13 bar at 20 °C (188 psi at 68 °F)
    1 bar at 120 °C (14 psi at 248 °F)

  • Temperature sensor

    NTC 30K

  • Ex certification


  • Connection

    Process: 1/2" and 3/4" NPT, Clamp 1 1/2"
    Cable: Memosens connector

  • Ingres protection


  • Additional certifications

    Calibration certification of the cell constante, material certification 3.1

Documents / Manuals / Software

Accessories / Spare parts

Order code
    • 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

    • Order code 50066536

      PVC-Threaded coupling G 1/2"

      for cementing in cross / T-pieces DN 20