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pH/ORP transmitter Liquisys CPM223

Compact panel device for all industries

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pH/ORP transmitter Liquisys CPM223

Compact panel device for all industries

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Benefits

  • More operational safety: Continuous process check system, customized alarm configuration, proven Memosens interface for reliable sensor connection.
  • Reliable self-monitoring: Sensor check system for pH glass and reference, calibration plausibility check.
  • Easy to operate and service: Intuitive user interface, hot plug & play with pre-calibrated Memosens sensors, 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.

Integrated technologies

Memosens technology
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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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.

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Product information

Liquisys CPM223 is a compact panel device for analog and digital (Memosens) pH/ORP sensors.
pH/ORP panel transmitter
Specifications
pH
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Description

Liquisys CPM223 is a standard pH/ORP transmitter for all analog and digital Memosens 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 two-point calibration make configuration and operation fast and easy.

Field of application

The Liquisys CPM223 transmitter works with all pH/ORP glass and ISFET sensors in non-hazardous areas, for example in these industries and their utilities:

  • Chemicals
  • Food & Beverages
  • Power & Energy
  • Water, Wastewater & Waste
  • Primaries & Metal

Liquisys CPM223 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, proven Memosens interface for reliable sensor connection.
  • Reliable self-monitoring: Sensor check system for pH glass and reference, calibration plausibility check.
  • Easy to operate and service: Intuitive user interface, hot plug & play with pre-calibrated Memosens sensors, 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
CPM120, CPM121, CPM220, CPM221
Downloads
Most downloaded
Operating Instruction (BA)
Liquisys M CPM223/253 Operating Instructions Transmitter
English version - 09/2015
Download
Technical Information (TI)
Liquisys M CPM223/253 Technical Information pH/ORP measurement
English version - 09/2014
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
41 Downloads
Technical Information (TI)
Most downloaded
Liquisys M CPM223/253 Technical Information pH/ORP measurement
English version - 09/2014
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 CPM223/253 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 CPM223 Transmitter for pH and ORP
Measurement with digital Memosens sensors
English version - 10/2025
Download
Short Instruction (KA)
KA Liquisys M CPM223 Transmitter for pH and ORP
Measurement with analog sensors
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)
Additional information for CSA Liquisys Additional information for CSA Liquisys
English version - 09/2013
Download
Special Documentation (SD)
Instructions for service kits Liquisis M Special documentation
Instructions for service kits Liquisis M / CPM223 / CLM223 / COM223 /
CUM223
English version - 05/2000
Download
Manufacturer Information (MI)
AMS HART Package V1.12.00 Manufacturer Information includes AMS - Device List, Release Notes – HART Manufacturer Information for users regarding software updates
(following the NAMUR recommendation 53)
New software version: 1.12.00
English version - 07/2015
Download
Manufacturer Information (MI)
PRM HART Package V1.08.00 Manufacturer Information includes PRM - Device List, Release Notes – HART Manufacturer Information for users regarding software updates
(following the NAMUR recommendation 53)
New software version: 1.08.00
English version - 07/2015
Download
Manufacturer Information (MI)
Simatic PDM PROFIBUS Package V1.12.00 Manufacturer Information includes PDM - Device List, Release Notes – PROFIBUS Manufacturer Information for users regarding software updates
(following the NAMUR recommendation 53)
New software version: 1.12.00
English version - 11/2015
Download
Manufacturer Information (MI)
PRM FOUNDATION fieldbus Package V1.05.00 Manufacturer Information includes PRM - Device List, Release Notes – FOUNDATION fieldbus Manufacturer Information for users regarding software updates
(following the NAMUR recommendation 53)
New software version: 1.05.00
English version - 07/2015
Download
Manufacturer Information (MI)
Simatic PDM HART Package 1.14.00 Manufacturer Information includes PDM - Device List, Release Notes – HART Manufacturer Information for users regarding software updates
(following the NAMUR recommendation 53)
New software version: 1.14.00
English version - 08/2015
Download
Manufacturer Information (MI)
AMS FOUNDATION fieldbus Package V1.06.00 Manufacturer Information includes AMS - Device List, Release Notes – FOUNDATION fieldbus Manufacturer Information for users regarding software updates
(following the NAMUR recommendation 53)
New software version: 1.06.00
English version - 07/2015
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)
pH-Messung in Industrieprozessen Auswahl- und Engineering-Hilfe für verschiedene Industriebranchen und
Applikationen
German version - 12/2021
Download
Competence Brochure (CP)
pH 測定セレクションガイド 産業プロセスにおけるpH測定
Japanese version - 06/2026
Download
Competence Brochure (CP)
pH measurement in industrial processes Selection and engineering guide for different industries and
applications
English version - 12/2021
Download
Manufacturer Declaration
Product family: Liquisys pH/ORP Product root: CPM223-
Declaration number: HE_02182_01.25
Manufacturer specification: RoHS
Additional information: China-RoHS
English version - 07/2025
Download

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Liquisys CPM223 is a compact panel device for analog and digital (Memosens) pH/ORP sensors.
pH/ORP panel transmitter

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pH/ORP panel transmitter
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CAD Drawings
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Spare parts and accessories

further parts
further parts

Kit CXM2X3 Relaismod. 2rel

further parts
further parts
Order code 51500320
further parts
further parts

KIT CXM2X3 relay mod. 2rel / CSA

further parts
further parts
Order code 51511446
Drawing number 290
further parts
further parts

Kit CXM2X3 Relaismodule 4rel

further parts
further parts
Order code 51500321
Drawing number 300
further parts
further parts

Kit CxM2x3: realy modul 4 R prot. coa

further parts
further parts
Order code 71129943
Drawing number 300
Spare parts & accessories

Selection of compatible products

/