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.

Analog conductivity sensor Condumax CLS15

Conductive conductivity sensor for standard applications in pure and ultrapure water

Office situation support
Have questions about this product?

Analog conductivity sensor Condumax CLS15

Conductive conductivity sensor for standard applications in pure and ultrapure water

Get a quote
Office situation support
Have questions about this product?

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 cell constant

Services and resources

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

Product support

Product information

Condumax CLS15 is a reliable conductivity sensor for pure and ultrapure water applications.
Conductive conductivity sensor
Specifications
Measuring / Application task Conductivity
No results found Try adjusting your search terms to see more results.
Description

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.

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
  • 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
  • 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 cell constant
Predecessors
CONDUCTIVITY MEASURING CELL CLS 10
Downloads
Most downloaded
Technical Information (TI)
Technical Information Condumax CLS15/CLS15D Conductivity conductively measured
English version - 10/2014
Download
Operating Instruction (BA)
Condumax CLS15/16/21 For contacting conductivity measurement in liquids
English version - 06/2022
Download
Competence Brochure (CP)
Leitfähigkeitsmessung in Industrieprozessen Auswahl- und Engineeringhilfe für verschiedene Industrien und
Anwendungen
German version - 04/2023
Download
The CAD Drawings will be available after the configuration.
All downloads
32 Downloads
Technical Information (TI)
Most downloaded
Technical Information Condumax CLS15/CLS15D Conductivity conductively measured
English version - 10/2014
Download
Operating Instruction (BA)
Most downloaded
Condumax CLS15/16/21 For contacting conductivity measurement in liquids
English version - 06/2022
Download
Ex Safety Instruction (XA)
XA Condumax CLS12, CLS13, CLS15, CLS16B, CLS21 Conductivity sensors with conductive measurement of conductivity
CSA C/US IS Cl. I Div. 1 GP A-D T3/T4/T6 + CSA C/US IS Cl. I Zone 0 AEx ia IIC T3/T4/T6
English version - 02/2026
Download
Ex Safety Instruction (XA)
XA Condumax CLS12, CLS13, CLS15, CLS16B, CLS21 Conductivity sensors with conductive measurement of conductivity
INMETRO Ex ia IIC T6 ... T3 Ga
English version - 09/2024
Download
Ex Safety Instruction (XA)
XA Condumax CLS12, CLS13, CLS15, CLS16B, CLS21 Conductivity sensors with conductive measurement of conductivity
EAC Ex 0Ex ia IIC T6 ... T2 Ga (only CLS13)
EAC Ex 0Ex ia IIC T6 ... T3 Ga (CLS12, CLS15, CLS16B and CLS21)
English version - 02/2026
Download
Ex Safety Instruction (XA)
XA Condumax CLS12, CLS13, CLS15, CLS16B, CLS21 Conductivity sensors with conductive measurement of conductivity
NEPSI Ex ia IIC T6 ... T2 Ga
English version - 04/2024
Download
Ex Safety Instruction (XA)
XA Condumax CLS15, CLS16B, CLS21 Conductivity sensors with conductive measurement of conductivity
UK II 1G Ex ia IIC T3/T4/T6 Ga
English version - 10/2024
Download
Ex Safety Instruction (XA)
XA Condumax CLS12, CLS13, CLS15, CLS16B, CLS21 Conductivity sensors with conductive measurement of conductivity
ATEX II 1G Ex ia IIC T6 ... T2 Ga
English version - 01/2024
Download
Fields of Activities (FA)
Sensors, transmitters, compact devices and assemblies Experts in Liquid Analysis
English version - 02/2026
Download
Fields of Activities (FA)
Sensoren, Messumformer, Kompaktgeräte and Armaturen Kompetenz in der Flüssigkeitsanalyse
German version - 02/2026
Download
Fields of Activities (FA)
Sensori, trasmettitori, dispositivi compatti e armature Sensori, trasmettitori,
dispositivi compatti e armature
Esperti in materia di analisi dei
liquidi
Italian version - 06/2026
Download
Fields of Activities (FA)
Endress+Hauser 水質分析計ファミリ ラインナップと事例
Japanese version - 03/2017
Download
Competence Brochure (CP)
産業プロセスにおける導電率の測定 さまざまな産業およびアプリケーション向けの選択およびエンジニアリングガイド
Japanese version - 01/2024
Download
Competence Brochure (CP)
Conductivity measurement in industrial processes Selection and engineering guide for different industries and
applications
English version - 04/2023
Download
Competence Brochure (CP)
Most downloaded
Leitfähigkeitsmessung in Industrieprozessen Auswahl- und Engineeringhilfe für verschiedene Industrien und
Anwendungen
German version - 04/2023
Download
EU Declaration
Product family: ConduMax W Product root: CLS15-
Declaration number: EC_00655_01.18
English version - 05/2018
Download
EU Declaration
Product family: ConduMax H, ConduMax W Product root: CLS12-, CLS13-, CLS15-, CLS16-, CLS21-
Declaration number: EC_00317_05.26
English version - 06/2026
Download
Miscellaneous
Product family: ConduMax H, ConduMax W, InduMax H, InduMax P, Memosens Product root: CLS12-, CLS13-, CLS15-, CLS15E-, CLS16-, CLS16E-, CLS21-, CLS21E-, CLS50-, CLS50D-, CLS54-, CLS54D-, CLS82E-
Region: Eurasian Economic Union
Approval agency: T-Standard
Approval number: ЕАЭС KZ 7500525.13.12.00631
Russian version - 02/2025
Download
Explosion Protection
Product family: CeraGel, CeraLiquid, ConduMax H, ConduMax W, InduMax H, InduMax P, Liquiline M, Memocheck, OrbiPac, OrbiPore, OrbiSi nt, Sensor, TopHit Product root: CLS12-, CLS13-, CLS15-, CLS16-, CLS21-, CLS50-, CLS54-, CM42-, CPF81-, CPF82-, CPS11-, CPS12-, CPS13-, CPS41-, CPS42-,
CPS441-, CPS471-, CPS491-, CPS71-, CPS72-, CPS91-, CPS92-, CTS1-, CYP03D-
Region: Canada
Approval agency: CSA
Protection: Ex i Cl. I Div. 1
English version - 06/2023
Download
Explosion Protection
Product family: CeraGel, CeraLiquid, ConduMax H, ConduMax W, InduMax P, Liquiline M, Memocheck, Memosens, Messkabel, OrbiPac, OrbiPo re, OrbiSint, OxyMax H, OxyMax W, Sensor, TopHit Product root: CLS12-, CLS13-, CLS15-, CLS15D-, CLS16-, CLS16D-, CLS21-, CLS21D-, CLS50-, CLS50D-, CLS82D-, CM42-, COS21D-, COS22D-,
COS51D-, CPF81-, CPF81D-, CPF82-, CPF82D-, CPS11-, CPS11D-, CPS12-, CPS12D-, CPS13-, CPS16D-, CPS171D-, CPS41-, CPS41D-, CPS42-, CPS
42D-, CPS441-, CPS441D-, CPS471-, CPS471D-, CPS491-, CPS491D-, CPS64-, CPS71-, CPS71D-, CPS72-, CPS72D-, CPS76D-, CPS91-, CPS91D-, C
PS92-, CPS92D-, CPS96D-, CTS1-, CYK10-, CYP01D-, CYP02D-, OPS171D-
Region: USA
Approval agency: FM
Protection: Ex i Cl. I Div. 1
English version - 10/2021
Download
Explosion Protection
Product family: CeraGel, CeraLiquid, ConduMax H, ConduMax W, InduMax H, InduMax P, OrbiPac, OrbiPore, OrbiSint, Sensor Product root: CLS12-, CLS13-, CLS15-, CLS16B-, CLS21-, CLS50-, CLS54-, CPF81-, CPF82-, CPS11-, CPS12-, CPS13-, CPS41-, CPS42-, CPS71
-, CPS72-, CPS91-, CPS92-, CTS1-
Region: USA
Approval agency: CSA
Protection: IS Cl. I Div. 1
English version - 03/2026
Download
Explosion Protection
Product family: ConduMax H, ConduMax W Product root: CLS12-, CLS13-, CLS15-, CLS16-, CLS16B-, CLS21-
Region: Brazil
Approval agency: TÜV
Protection: Ex ia IIC T3 Ga, Ex ia IIC T4 Ga, Ex ia IIC T6 Ga
Portuguese version - 05/2024
Download
Explosion Protection
Product family: ConduMax H, ConduMax W Product root: CLS12-, CLS13-, CLS15-, CLS16-, CLS16B-, CLS21-
Region: Europe (ATEX)
Approval agency: TÜV
Protection: Ex i Zone 0
English version - 12/2023
Download
Explosion Protection
Product family: ConduMax H, ConduMax W Product root: CLS12-, CLS13-, CLS15-, CLS16-, CLS21-
Region: China
Approval agency: NEPSI
Protection: Ex i
Chinese version - 07/2023
Download

Back
Change version
Change version

Selection of compatible products

/

Spare parts

further parts
further parts

cable connector 4 pole PG9

further parts
further parts
Order code 51500076

PVC-Threaded coupling G 1/2"

Order code 50066536

PVDF Adapter G 1/2" - G 1"

Order code 50004381

AM 32 equalizing sleeve DN32, PVC

Order code 50004738
Spare parts
Condumax CLS15 is a reliable conductivity sensor for pure and ultrapure water applications.
Conductive 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
Condumax CLS15 is a reliable conductivity sensor for pure and ultrapure water applications.
Conductive 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

further parts
further parts

cable connector 4 pole PG9

further parts
further parts
Order code 51500076

PVC-Threaded coupling G 1/2"

Order code 50066536

PVDF Adapter G 1/2" - G 1"

Order code 50004381

AM 32 equalizing sleeve DN32, PVC

Order code 50004738
Spare parts

Selection of compatible products

/