Title

Try searching by key words, order- or product code or serial number e.g. “CM442” or “Technical information”
Enter at least 2 characters to start the search.

Digital conductivity sensor Memosens CLS15E

Memosens 2.0 contacting conductivity sensor for standard applications in pure and ultrapure water

Office situation support
Have questions about this product?

Digital conductivity sensor Memosens CLS15E

Memosens 2.0 contacting conductivity sensor for standard applications in pure and ultrapure water

Get a quote

Benefits

  • Designed for low maintenance and a long operating life, the sensor offers best value for money.
  • The sensor is sterilizable and autoclavable, allowing for installation in sterile plants.
  • Thanks to its electrode geometry, Memosens CLS15E provides reliable and accurate measured values at low conductivities.
  • A quality certificate stating the individual cell constant enables perfect adjustment of the measuring point.
  • IIoT ready: Memosens 2.0 offers extended storage of calibration and process data, enabling better trend identification and providing a future-proof basis for predictive maintenance and enhanced IIoT services.
  • Non-contact inductive signal transmission ensures maximum process safety.

Integrated technologies

Memosens technology
Liquiline: cutting-edge transmitter platform
FLEXible answers to individual needs
Current product

Digital conductivity sensor Memosens CLS15E

F
L
E
X
  • High-end products
  • Highly functional and convenient

What is FLEX?

FLEX selections
Technical excellence
Simplicity
F
L
E
X
Fundamental selection Meet your basic measurement needs
F
L
E
X
Lean selection Handle your core processes easily
F
L
E
X
Extended selection Optimize your processes with innovative technologies
F
L
E
X
Xpert selection Master your most challenging applications
Variable
Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

Learn more

Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

Learn more

24/7 customer portal

Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

Register now / Log in

Technology
Memosens technology

Memosens 2.0: Cutting-edge sensor technology reloaded

Make life easier, increase process safety and stay connected with Memosens 2.0 digital technology.

Technology

Liquiline: cutting-edge transmitter platform

By choosing the Liquiline platform, you’re effectively choosing to spend less money on stock holding, save installation time and gain operational safety!

Save to list *Saved to list
Office situation support
Have questions about this product?

Product information

Memosens CLS15E - Digital contacting conductivity sensor for pure and ultrapure water
Memosens CLS15E conductivity sensor
Specifications
Measuring / Application task Conductivity
No results found Try adjusting your search terms to see more results.
Description

Memosens CLS15E is perfectly suited for conductivity measurement in applications with low measuring ranges such as boiler feedwater and chip cleaning. The contacting conductivity sensor performs reliably and accurately even in hazardous areas. CLS15E features Memosens 2.0 digital technology, offering extended storage of calibration, adjustment and process data. It facilitates predictive maintenance and provides the perfect basis for IIoT services.

Field of application

Memosens CLS15E measures conductivity in pure and ultrapure water applications for the monitoring and control of:

  • Boiler feedwater
  • Ion exchangers
  • Reverse osmosis
  • Cooling water
  • Distillation
  • Chip cleaning

The digital sensor can be used in power plants for:

  • Degassed conductivity
  • pH measurement with differential conductivity

With its international explosion protection approvals, such as ATEX and FM, the sensor is suitable for hazardous area use.

Benefits
  • Designed for low maintenance and a long operating life, the sensor offers best value for money.
  • The sensor is sterilizable and autoclavable, allowing for installation in sterile plants.
  • Thanks to its electrode geometry, Memosens CLS15E provides reliable and accurate measured values at low conductivities.
  • A quality certificate stating the individual cell constant enables perfect adjustment of the measuring point.
  • IIoT ready: Memosens 2.0 offers extended storage of calibration and process data, enabling better trend identification and providing a future-proof basis for predictive maintenance and enhanced IIoT services.
  • Non-contact inductive signal transmission ensures maximum process safety.
Predecessors
Downloads
Most downloaded
Technical Information (TI)
Memosens CLS15E Digital conductivity sensor with Memosens 2.0 technology
English version - 02/2021
Download
Operating Instruction (BA)
Memosens CLS15E Conductivity sensor with Memosens protocol
English version - 06/2022
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E Digital conductivity sensors with Memosens technology
INMETRO Ex ia IIC T3/T4/T6 Ga
English version - 11/2024
Download
The CAD Drawings will be available after the configuration.
All downloads
46 Downloads
Technical Information (TI)
Most downloaded
Memosens CLS15E Digital conductivity sensor with Memosens 2.0 technology
English version - 02/2021
Download
Operating Instruction (BA)
Most downloaded
Memosens CLS15E Conductivity sensor with Memosens protocol
English version - 06/2022
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E Digital conductivity sensors with Memosens technology
INMETRO Ex ia IIC T3/T4/T6 Ga
English version - 11/2024
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E Digital conductivity sensors with Memosens technology
CSA C/US IS Cl. 1 Div. 1 GP A-D T3/T4/T6 + CSA C/US IS Cl. 1 Zone 0 AEx ia IIC T3/T4/T6
English version - 07/2026
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E Digital conductivity sensors with Memosens technology
NEPSI Ex ia IIC T3/T4/T6 Ga
English version - 04/2024
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E EAC Ex 0Ex ia IIC T3/T4/T6 Ga X
Safety instructions for electrical apparatus in explosion-hazardous areas
English version - 02/2026
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E Digital conductivity sensors with Memosens technology
KOR Ex ia IIC T6...T3 Ga
English version - 03/2024
Download
Ex Safety Instruction (XA)
Memosens CLS15E, CLS16E, CLS21E, CLS82E Supplement to: BA02018C, BA02019C, BA02020C and BA02027C
Safety instructions for electrical apparatus in explosion-hazardous
areas
JPN Ex ia IIC T3/T4/T6 Ga
English version - 08/2021
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E Digital conductivity sensors with Memosens technology
UK II 1 G Ex ia IIC T3/T4/T6 Ga
English version - 03/2024
Download
Ex Safety Instruction (XA)
XA Memosens CLS15E, CLS16E, CLS21E, CLS82E Digital conductivity sensors with Memosens technology
ATEX: II 1 G Ex ia IIC T3/T4/T6 Ga
IECEx: Ex ia IIC T3/T4/T6 Ga
English version - 03/2024
Download
PU (Publication)
公用工程的节能方案 蒸汽、压缩空气、加热、冷却和工业气体解决方案
Chinese version - 09/2023
Download
PU (Publication)
ユーティリティにおける省エネ 蒸気、圧縮空気、加熱、冷却、産業ガス用ソリューション 蒸気、圧縮空気、加熱、冷却、産業ガス用ソリューション
Japanese version - 03/2024
Download
PU (Publication)
Infographie : Réduisez vos coûts énergétiques dans vos utilités grâce à la mesure Infographie : Réduisez vos coûts énergétiques
dans vos utilités grâce à la mesure
French version - 03/2024
Download
PU (Publication)
Решения для систем, работающих с паром Решения для систем, работающих с паром
Russian version - 04/2024
Download
PU (Publication)
Úspory energie v technologických zařízeních Řešení pro páru,
stlačený vzduch,
vytápění, chlazení
a průmyslové plyny
Czech version - 03/2024
Download
PU (Publication)
유틸리티의 에너지 절약 증기, 압축 공기, 가열, 냉각, 산업용 가스를 위한 솔루션
Korean version - 04/2024
Download
PU (Publication)
Ebook Oszczędność energii w mediach użytkowych
Polish version - 04/2024
Download
PU (Publication)
Energy savings in utilities: Solutions for steam, compressed air, heating, cooling and industrial gases Solutions for steam, compressed air,
heating, cooling and industrial gases
English version - 12/2023
Download
PU (Publication)
Инфографика: Снижение энергозатрат на коммунальных объектах Инфографика: Снижение энергозатрат на коммунальных объектах
Russian version - 04/2024
Download
PU (Publication)
E-book Energiebesparingen in utiliteiten Oplossingen voor stoom, perslucht,
verwarming, koeling en industriële gassen
Dutch version - 03/2024
Download
PU (Publication)
Energieeinsparungen in Hilfskreislaeufen Energiesparloesungen für Dampf, Druckluft,
Heizung, Kühlung und Industriegas
German version - 10/2023
Download
PU (Publication)
Ahorro energético en servicios generales: Soluciones para vapor, aire comprimido, calefacción, refrigeración y gases industriales Soluciones para vapor, aire comprimido,
calefacción, refrigeración y gases industriales
Spanish version - 04/2024
Download
PU (Publication)
Energy savings in utilities: Solutions for steam, compressed air, heating, cooling and industrial gases Solutions for steam, compressed air,
heating, cooling and industrial gases
Language neutral - 12/2023
Download
Fields of Activities (FA)
水質分析の専門知識 センサからすべてを備えた
ターンキーソリューションまで
Japanese version - 06/2025
Download

Back
Change version
Change version

Selection of compatible products

/

Spare parts and accessories

further parts
further parts

PVC-Threaded coupling G 1/2"

further parts
further parts
Order code 50066536

PVDF Adapter G 1/2" - G 1"

Order code 50004381

AM 32 equalizing sleeve DN32, PVC

Order code 50004738

AM 40 equalizing sleeve DN40, PVC

Order code 50004739
Spare parts and accessories
Memosens CLS15E - Digital contacting conductivity sensor for pure and ultrapure water
Memosens CLS15E conductivity sensor

Choose from our suggested options

Looking for more options?

Use the extended configuration to configure from all available options.

<%label%>
<%feature%>
-
-
<%feature%>

<%message%>

Configure from all available options Use extended configuration
Order code
Copy
-
-
Add to cart
More actions
Available once configuration is complete
Service not available
Only available on our desktop experience
Configuration details
Memosens CLS15E - Digital contacting conductivity sensor for pure and ultrapure water
Memosens CLS15E conductivity sensor
Section ID Selected option

<%feature%>

<%coding%>

<%label%>

CAD Drawings
Configuration support

Unsure about configuration details?

Our experts can help, whatever stage your configuration is at.

Add your product to the cart and request a quote. Whether it is un-configured, partially configured, or fully configured, our experts will contact you to complete the configuration and provide your quote.

Have questions before you start?

Contact us

Spare parts and accessories

further parts
further parts

PVC-Threaded coupling G 1/2"

further parts
further parts
Order code 50066536

PVDF Adapter G 1/2" - G 1"

Order code 50004381

AM 32 equalizing sleeve DN32, PVC

Order code 50004738

AM 40 equalizing sleeve DN40, PVC

Order code 50004739
Spare parts and accessories

Selection of compatible products

/