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Conductivity transmitter Liquisys CLM253

Compact field device for all industries

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Conductivity transmitter Liquisys CLM253

Compact field device for all industries

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Benefits

  • More operational safety: Continuous process check system, customized alarm configuration, calibration plausibility check.
  • Broad functionality: Conductivity, resistivity and concentration measurement, ultrapure water monitoring according to USP and EP.
  • Easy to operate and service: Intuitive user interface, easy calibration, direct access for manual contact control.
  • Reduced maintenance: Automatic cleaning function (with Chemoclean) triggered by alarm or limit switch.
  • Fit for every application: Numerous extensions, such as P(ID) controller, timer, etc., allow for flexible adaption to all processes.
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.

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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.

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Product information

Liquisys CLM253 is a compact field transmitter for conductivity, resistivity and concentration.
Conductivity field transmitter
Specifications
Measuring / Application task Conductivity
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Description

Liquisys CLM253 is a standard transmitter for all analog conductivity sensors. It improves your operational safety thanks to continuous plausibility, process and sensor checks. Select from numerous hardware and software modules, such as relays or fieldbus communication, to adapt it exactly to your measuring task. This modularity also allows you to upgrade the transmitter at any time. A simple menu and calibration make configuration and operation fast and easy.

Field of application

The Liquisys CLM253 transmitter works with all analog conductivity sensors in non-hazardous areas, for example in these industries and their utilities:

  • Chemicals
  • Food & Beverages
  • Life Sciences
  • Power & Energy
  • Water &Wastewater
  • Primaries & Metal

Liquisys CLM253 features the following protocols and interfaces:

  • 0/4...20 mA
  • HART
  • PROFIBUS DP
  • PROFIBUS PA
Benefits
  • More operational safety: Continuous process check system, customized alarm configuration, calibration plausibility check.
  • Broad functionality: Conductivity, resistivity and concentration measurement, ultrapure water monitoring according to USP and EP.
  • Easy to operate and service: Intuitive user interface, easy calibration, direct access for manual contact control.
  • Reduced maintenance: Automatic cleaning function (with Chemoclean) triggered by alarm or limit switch.
  • Fit for every application: Numerous extensions, such as P(ID) controller, timer, etc., allow for flexible adaption to all processes.
Predecessors
CLM141S, CLM141, CLM170, CLM130, CLM240, CLM151, CLM252
Downloads
Most downloaded
Operating Instruction (BA)
Liquisys M CLM223/253 Operating Instructions Transmitter
English version - 09/2015
Download
Technical Information (TI)
Liquisys M CLM223/253 Technical Information Transmitter for conductive and inductive sensors
English version - 12/2014
Download
Operating Instruction (BA)
Operating Instructions Liquisys M CXM223/253 PROFIBUS Field Communikation for Liquisys M CXM223/253
English version - 12/2011
Download
The CAD Drawings will be available after the configuration.
All downloads
35 Downloads
Technical Information (TI)
Most downloaded
Liquisys M CLM223/253 Technical Information Transmitter for conductive and inductive sensors
English version - 12/2014
Download
Operating Instruction (BA)
Operating Instructions Liquisys M CXM223/253 PROFIBUS Field Communikation for Liquisys M CXM223/253
English version - 12/2011
Download
Operating Instruction (BA)
Most downloaded
Liquisys M CLM223/253 Operating Instructions Transmitter
English version - 09/2015
Download
Operating Instruction (BA)
Operating Instructions Liquisys M CXM223/253 HART Field Communication with Liquisys M CXM223/253
English version - 10/2005
Download
Short Instruction (KA)
KA Liquisys M CLM253 Transmitter for conductivity
English version - 10/2025
Download
Installation Instructions (EA)
EA Liquisys M CxM223/253 and Smartec S CLD132/134 Central modules
English version - 09/2026
Download
Ex Safety Instruction (XA)
Ex-safety instructions CXM2X3 Safety instructions for electrical apparatus for explosion-hazardous
areas as per EC Directive 94/9/EC (ATEX)
English version - 06/2005
Download
Special Documentation (SD)
Instructions for service kits Liquisis M Special documents
Instructions for service kits Liquisis M / CPM253 / CLM253 / COM253 /
CUM253
English version - 05/2000
Download
Special Documentation (SD)
Additional information for CSA Liquisys Additional information for CSA Liquisys
English version - 09/2013
Download
Special Documentation (SD)
Installation of M 12 plug Special Documentation Installation of M 12 plug
CPM253 / COM253 / CLM253 / CUM253
English version - 10/1999
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)
Leitfähigkeitsmessung in Industrieprozessen Auswahl- und Engineeringhilfe für verschiedene Industrien und
Anwendungen
German version - 04/2023
Download
Manufacturer Declaration
Product family: Liquisys conductivity Product root: CLM253-
Declaration number: HE_01956_02.25
Manufacturer specification: RoHS
Additional information: China-RoHS
English version - 07/2025
Download
EU Declaration
Product family: Liquisys chlorine, Liquisys conductivity, Liquisys oxygen, Liquisys pH/ORP Product root: CCM223-, CCM253-, CLM223-, CLM253-, COM223-, COM253-, CPM223-, CPM253-
Declaration number: EC_00575_02.23
English version - 07/2023
Download
UK Conformity Assessed
Product family: Liquisys chlorine, Liquisys conductivity, Liquisys oxygen, Liquisys pH/ORP Product root: CCM223-, CCM253-, CLM223-, CLM253-, COM223-, COM253-, CPM223-, CPM253-
Declaration number: UK_00563_01.23
Additional information: UK DoC for C*M2*3
English version - 07/2023
Download
Product Carbon Footprint Information
Product family: Liquisys conductivity Product root: CLM253-
Declaration number: ED_00196_01.24
English version - 11/2024
Download
Miscellaneous
Product family: Liquisys conductivity Product root: CLM223-, CLM253-
Region: Eurasian Economic Union
Approval agency: EAC
Approval number: ЕАEС KZ 7500525.13.12.00635
Russian version - 02/2025
Download
Miscellaneous
Product family: Liquiline, Liquiline M, Liquisys chlorine, Liquisys conductivity, Liquisys pH/ORP Product root: CCM223-, CCM253-, CLM223-, CLM223F-, CLM253-, CM14-, CM42-, CM442-, CM442R-, CM444-, CM444R-, CM448-, CM448R-, CM44P-,
CM72-, CM82-, CPM223-, CPM253-
Region: Eurasian Economic Union
Approval agency: EAC
Approval number: ЕАEС KZ 7500525.13.12.00633
Russian version - 02/2025
Download
Miscellaneous
Product family: Liquisys conductivity Product root: CLM223-, CLM253-
Region: Eurasian Economic Union
Approval agency: EAC
Approval number: EAEC KZ 7500525.13.12.00625
Russian version - 02/2025
Download
Metrology
Product family: Liquisys conductivity Product root: CLM223-, CLM253-
Region: Kazakhstan
Approval agency: KazStandard
Approval number: KZ15VTN00006953
Metrology type: Metrology
Russian version - 07/2025
Download
Ordinary Location Product Safety
Product family: Liquisys chlorine, Liquisys conductivity, LIQUISYS M, Liquisys oxygen, Liquisys pH/ORP, Liquisys turbidity, SmarTec S Product root: CCM223-, CCM253-, CLD134-, CLM223-, CLM223F-, CLM253-, COM223-, COM223F-, COM253-, COM253F-, CPM223-, CPM253-, CUM223-
, CUM253-
Region: Canada/USA
Approval agency: CSA
English version - 04/2018
Download
Tender Text
Liquisys CLM253 Leitfähigkeits- und Temperatur Messumformer für konduktive und induktive
Messzellen
German version - 06/2016
Download
General Station Description (GSD)
General Station Description (GSD) - Liquisys CC - PROFIBUS DP Any, PROFIBUS System, Any
Language neutral - 11/2023
Download

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Spare parts and accessories

further parts
further parts

KIT CXM253 housing cover

further parts
further parts
Order code 51501068
Drawing number 410,420,46
further parts
further parts

Kit CxM253: Front foil + 6 key lifters

further parts
further parts
Order code 71071446
Drawing number 335
further parts
further parts

KIT CXM253 Internal housing parts

further parts
further parts
Order code 51501073
Drawing number 330,340,45
further parts
further parts

Transmitter connector set M12 Fieldbus

further parts
further parts
Order code 51502184
Spare parts and accessories
Liquisys CLM253 is a compact field transmitter for conductivity, resistivity and concentration.
Conductivity field transmitter

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Conductivity field transmitter
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Spare parts and accessories

further parts
further parts

KIT CXM253 housing cover

further parts
further parts
Order code 51501068
Drawing number 410,420,46
further parts
further parts

Kit CxM253: Front foil + 6 key lifters

further parts
further parts
Order code 71071446
Drawing number 335
further parts
further parts

KIT CXM253 Internal housing parts

further parts
further parts
Order code 51501073
Drawing number 330,340,45
further parts
further parts

Transmitter connector set M12 Fieldbus

further parts
further parts
Order code 51502184
Spare parts and accessories

Selection of compatible products

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