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1-channel transmitter Liquiline Compact CM72

Single-parameter field device for hazardous and non-hazardous applications in all industries

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1-channel transmitter Liquiline Compact CM72

Single-parameter field device for hazardous and non-hazardous applications in all industries

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

Benefits

  • Space-saving installation:
The two-wire device fits inside an assembly and does not require its own power supply.
  • Fast start-up:
Thanks to its fixed configuration, the CM72 does not have to be commissioned and can quickly start its work.
  • Benefit from all the advantages of Memosens technology:
Memosens sensors offer you the safest data transmission, the highest measured value availability and total ease of use.
  • On-site diagnostics:
The status of the transmitter and the connected sensor are indicated with a red/green LED.
  • Suitable for all locations:
Whether your measuring point is exposed to dust, vapor, rain, snow, heat or cold, the CM72 will always be exactly the right transmitter for you.
FLEXible answers to individual needs
Current product

1-channel transmitter Liquiline Compact CM72

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  • Easy to select, install and operate

What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
Variable
5-year warranty

Engineered for Confidence

Our Fundamental Selection instruments feature an extended 5-year warranty – a clear testament of our trust in their long-term reliability and performance.

Should a warranty case occur, you can count on a fast replacement process and minimal administrative effort – giving you peace of mind when it matters most and helping you keep your operations running smoothly.

Warranty terms apply

The extended warranty is 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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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.

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Product information

Liquiline Compact CM72 is a small transmitter for Memosens sensors.
Field transmitter for Memosens sensors
Specifications
pH
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Description

The Liquiline Compact CM72 is a small transmitter for Memosens sensors. It is the right choice for you if installation space is limited and you don't need the flexibility of a multiparameter device. Together with the sensor, it fits into most assemblies and couldn't be easier to install. The measuring parameter and measuring range are already defined during the ordering process, making the CM72 immediately ready for use with a high degree of safety against operating errors.

Field of application

Liquiline Compact CM72 can be used in all industries and their utilities and supports all sensors with the blue Memosens plug-in head:

  • pH sensors
  • ORP sensors
  • Conductivity sensors
  • Oxygen sensors

The measurement parameter and range are specified when ordering and can not be changed afterwards.

The 2-wire device features the following interface:

  • 4...20 mA

With its international explosion protection approvals, such as IECEx, ATEX, and CSA, CM72 is suitable for hazardous area use.

Benefits
  • Space-saving installation:
The two-wire device fits inside an assembly and does not require its own power supply.
  • Fast start-up:
Thanks to its fixed configuration, the CM72 does not have to be commissioned and can quickly start its work.
  • Benefit from all the advantages of Memosens technology:
Memosens sensors offer you the safest data transmission, the highest measured value availability and total ease of use.
  • On-site diagnostics:
The status of the transmitter and the connected sensor are indicated with a red/green LED.
  • Suitable for all locations:
Whether your measuring point is exposed to dust, vapor, rain, snow, heat or cold, the CM72 will always be exactly the right transmitter for you.
Downloads
Most downloaded
Technical Information (TI)
Liquiline Compact CM72 Single-parameter transmitter for Memosens sensors
English version - 02/2023
Download
Operating Instruction (BA)
Liquiline Compact CM72 Compact single-parameter transmitter for Memosens sensors
English version - 11/2022
Download
Operating Instruction (BA)
Junction Box Operating Instructions Junction Box
English version - 04/2018
Download
The CAD Drawings will be available after the configuration.
All downloads
47 Downloads
Technical Information (TI)
Most downloaded
Liquiline Compact CM72 Single-parameter transmitter for Memosens sensors
English version - 02/2023
Download
Operating Instruction (BA)
Junction Box Operating Instructions Junction Box
English version - 04/2018
Download
Operating Instruction (BA)
Most downloaded
Liquiline Compact CM72 Compact single-parameter transmitter for Memosens sensors
English version - 11/2022
Download
Short Instruction (KA)
Liquiline Compact CM72 Compact single-parameter transmitter for Memosens sensors
English version - 07/2021
Download
Ex Safety Instruction (XA)
XA Liquiline CM82 and CM72 Supplement to:
BA01797C and BA01845C
Safety instructions for electrical apparatus for explosion-hazardous
areas
 
English version - 08/2024
Download
Ex Safety Instruction (XA)
XA Liquiline Compact CM72 Liquiline Compact CM82 Compact transmitter for Memosens sensors
EAC Ex 0Ex ia IIC T4/T6 Ga
EAC Ex 0Ex ia IIC T4/T6 Ga + EAC Ex ia IIIC T85°C/T135°C Db
English version - 12/2025
Download
Ex Safety Instruction (XA)
Liquiline CM82 and CM72 UK Ex II 1G Ex ia IIC T6/T4 Ga
English version - 11/2022
Download
Ex Safety Instruction (XA)
XA Liquiline Compact CM72 Liquiline Compact CM82 Compact transmitters for Memosens sensors
ATEX:
II 1G Ex ia IIC T4/T6 Ga
II 1G Ex ia IIC T6/T4 Ga + II 2D Ex ia IIIC T85oC/T135oC Db
IECEx:
Ex ia IIC T4/T6 Ga
Ex ia IIC T6/T4 Ga + Ex ia IIIC T85oC/T135oC Db
English version - 06/2026
Download
Ex Safety Instruction (XA)
Liquiline CM82 and CM72 Supplement to:
BA01797C and BA01845C
Safety instructions for electrical apparatus in explosion-hazardous
areas
 
English version - 11/2020
Download
Ex Safety Instruction (XA)
Liquiline CM82 and CM72 Supplement to:
BA01797C and BA01845C
Safety instructions for electrical apparatus in explosion-hazardous
areas
JPN Ex ia IIC T4/T6 Ga
English version - 02/2022
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)
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
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: Liquiline, Liquiline M Product root: CM72-, CM82-
Declaration number: HE_02092_01.25
Manufacturer specification: Performance characteristics
English version - 03/2025
Download
Manufacturer Declaration
Product family: Liquiline, Liquiline M Product root: CM72-, CM82-
Declaration number: HE_01838_02.25
Manufacturer specification: RoHS
Additional information: China-RoHS
English version - 08/2025
Download
EU Declaration
Product family: Liquiline M Product root: CM72-
Declaration number: EC_00583_03.22
Additional information: EU DoC for CM72 non-ex.
English version - 11/2022
Download
EU Declaration
Product family: Liquiline M Product root: CM72-
Declaration number: EC_00673_04.26
Additional information: EU DoC for CM72 ex.
English version - 06/2026
Download

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Liquiline Compact CM72 is a small transmitter for Memosens sensors.
Field transmitter for Memosens sensors

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Field transmitter for Memosens sensors
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Spare parts

further parts
further parts

Memocheck CYP02D

further parts
further parts
Order code CYP02D-
further parts
further parts

Memocheck Sim CYP03D

further parts
further parts
Order code CYP03D-
further parts
further parts

Service

further parts
further parts
Order code DIENST-
further parts
further parts

Loop Powered Process Indicator RIA15

further parts
further parts
Order code RIA15-
Spare parts

Selection of compatible products

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