Name: Liquiline CM444
Brand: Endress+Hauser
Availability: InStock

4-channel transmitter Liquiline CM444

Expandable multiparameter field device for all industries

Liquiline CM444 is a state-of-the-art transmitter for pH, ORP, conductivity, oxygen and more.

The transmitter's modular design allows you to easily add functionality at any time.

Liquiline CM444 is a state-of-the-art transmitter for pH, ORP, conductivity, oxygen, chlorine, turbidity, sludge level, SAC, nitrate and many other parameters.

Liquiline transmitters with Heartbeat Technology offer status-oriented maintenance and easy verification of the measuring point and help you to carry out optimization measures.

Stay flexible with the Liquiline CM444 transmitter: its modular design allows you to easily add functionality at any time (e.g. digital fieldbuses, number of channels, relays, etc.).

Memosens converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection. This video shows how Memosens optimizes process control and maintenance.

Have questions about this product?

4-channel transmitter Liquiline CM444

Expandable multiparameter field device for all industries

Get a quote

Save to list *Saved to list

Benefits

Clever simplicity:  One controller for all parameters and applications, intuitive user interface, automatic sensor recognition, hot plug & play with pre-calibrated Memosens sensors.
Highest flexibility:  Universal modules for all parameters minimize spare part stock and allow for easy 1-click extension to up to 8 channels at any time.
Seamless system integration:  Unique portfolio of communication standards suits every distributed control system (DCS).
Simple and safe commissioning:  Saving configuration on SD card enables fast set-up on duplicate installations.
Process control from a distance:  Integrated web server that allows the operator to remotely view diagnostic data, perform configurations, or access device parameters in any web browser - even via Smartphone.
Higher availability, lower costs:  Heartbeat Technology enables status-oriented maintenance and easy verification of the entire measuring point and helps to carry out optimization measures.
Drive connectivity: Liquiline Edge Module CYY7 transfers process data to Netilion, independently of the fieldbus. This allows remote overview and the use of IIoT services. It’s available in new products or as upgrade to installed Liquiline platforms.

Integrated technologies

Services and resources

Product Support Product documentation, troubleshooting articles, device details and more.

FLEXible answers to individual needs

Current product

4-channel transmitter Liquiline CM444

High-end products
Highly functional and convenient

What is FLEX?

FLEX selections

Technical excellence

Simplicity

Fundamental selection Meet your basic measurement needs

Lean selection Handle your core processes easily

Extended selection Optimize your processes with innovative technologies

Xpert selection Master your most challenging applications

Variable

Learn more about the FLEX selections

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.

Technology

Memosens 2.0: Cutting-edge sensor technology reloaded

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

More information

Technology

Smart instrumentation through Heartbeat Technology

You want to increase plant performance and reduce costs? Our smart instrumentation portfolio with Heartbeat Technology offers in-depth device insight for more cost-efficiency and operational safety.

More information

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!

More information

Have questions about this product?

Selection of compatible products

Bundle

Multiparameter drinking water panel

Ready-to-use panel bundle for measurement of the most important drinking water parameters pH, conductivity, turbidity and free chlorine

Bundle

Multiparameter drinking water panel with oxygen measurement

Turnkey panel for measuring the main drinking water parameters: dissolved oxygen, turbidity, pH and conductivity

Bundle

Compact SWAS solution for boiler feed water monitoring

SWAS Compact: reliable monitoring of steam/water cycles

Compact, ready-to-use solution for accurate monitoring of feed water quality during steam generation

Advanced Data Manager Memograph M, RSG45

Memograph M RSG45 data manager

Advanced data and energy manager with up to 20 analog/HART® inputs and 14 digital inputs

Ecograph T RSG35 - Universal Graphic Data Manager

Ecograph T RSG35 data manager

Graphic data manager with up to 12 analog and 6 digital inputs

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

Liquiline Control CDC90 is an automatic cleaning and calibration system for pH and ORP sensors.

Cleaning and calibration system Liquiline Control CDC90

Fully automatic system for pH and ORP measuring points in many industries

Spare parts and accessories

further parts

Kit base module BASE-E

further parts

Order code 71141336

Drawing number 7

further parts

Kit: module ETH

further parts

Order code 71272410

Drawing number 14

further parts

Kit: base module BASE2-E

further parts

Order code 71431302

Drawing number 7

further parts

Kit : module AOR

further parts

Order code 71111053

Drawing number 14

Spare parts & accessories

Monitoring water quality in fish farms

Optimal water quality in fish farming with the Endress+Hauser monitoring solution with the latest measurement technology and data management

Read the full story

Success story

Toilet flushing with a fresh sea breeze

Using seawater to flush toilets can save a lot of drinking water. To ensure a constant water supply, the sensors used must function reliably to meet the water quality objectives (WQO).

Read the full story

Media

Firmware for Liquiline 4-wire devices

Click here to download the latest firmware version of the Liquiline platform

More information

Choose from our suggested options

Looking for more options?

Use the extended configuration to configure from all available options.

<%label%>

<%feature%>

<%coding%>

<%label%>

<%coding%>

<%label%>

<%feature%>

<%message%>

Looking for more options? Use extended configuration

Order code

Add to cart

More actions

Only available on our desktop experience

Use extended configuration

Configuration details

Liquiline CM444 is a digital transmitter for pH, ORP, conductivity, oxygen, turbidity and more.

Field transmitter for digital sensors

Section	ID	Selected option
<%feature%>	<%coding%>	<%label%>

CAD Drawings

Configuration support

Spare parts and accessories

further parts

Kit base module BASE-E

further parts

Order code 71141336

Drawing number 7

further parts

Kit: module ETH

further parts

Order code 71272410

Drawing number 14

further parts

Kit: base module BASE2-E

further parts

Order code 71431302

Drawing number 7

further parts

Kit : module AOR

further parts

Order code 71111053

Drawing number 14

Spare parts & accessories

Selection of compatible products

Bundle

Multiparameter drinking water panel

Ready-to-use panel bundle for measurement of the most important drinking water parameters pH, conductivity, turbidity and free chlorine

Bundle

Multiparameter drinking water panel with oxygen measurement

Turnkey panel for measuring the main drinking water parameters: dissolved oxygen, turbidity, pH and conductivity

Bundle

SWAS Compact: reliable monitoring of steam/water cycles

Compact, ready-to-use solution for accurate monitoring of feed water quality during steam generation

Memograph M RSG45 data manager

Advanced data and energy manager with up to 20 analog/HART® inputs and 14 digital inputs

Ecograph T RSG35 data manager

Graphic data manager with up to 12 analog and 6 digital inputs

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

Cleaning and calibration system Liquiline Control CDC90

Fully automatic system for pH and ORP measuring points in many industries

Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Potentiometric
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Material	Housing base: PC-FR Housing seal: EPDM
Dimension	237 x 194 x 162 mm 9.33 x 7.64 x 6.38 inch
Process temperature	-20 to 55 °C (0 to 130 °F)
Certificates, declarations and approvals	EAC, cCSAus
Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Sensor ORP / Redox
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Material	Housing base: PC-FR Housing seal: EPDM
Dimension	237 x 194 x 162 mm 9.33 x 7.64 x 6.38 inch
Process temperature	-20 to 55 °C (0 to 130 °F)
Certificates, declarations and approvals	EAC, cCSAus
Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Conductive
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Material	Housing base: PC-FR Housing seal: EPDM
Dimension	237 x 194 x 162 mm 9.33 x 7.64 x 6.38 inch
Process temperature	-20 to 55 °C (0 to 130 °F)
Certificates, declarations and approvals	EAC, cCSAus
Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Amperometric oxygen measurement
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Material	Housing base: PC-FR Housing seal: EPDM
Dimension	237 x 194 x 162 mm 9.33 x 7.64 x 6.38 inch
Process temperature	-20 to 55 °C (0 to 130 °F)
Certificates, declarations and approvals	EAC, cCSAus
Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Free chlorine
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Material	Housing base: PC-FR Housing seal: EPDM
Dimension	237 x 194 x 162 mm 9.33 x 7.64 x 6.38 inch
Process temperature	-20 to 55 °C (0 to 130 °F)
Certificates, declarations and approvals	EAC, cCSAus
Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Single beam scattered light
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Material	Housing base: PC-FR Housing seal: EPDM
Dimension	237 x 194 x 162 mm 9.33 x 7.64 x 6.38 inch
Process temperature	-20 to 55 °C (0 to 130 °F)
Certificates, declarations and approvals	EAC, cCSAus
Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Ultrasonic sensor
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Material	Housing base: PC-FR Housing seal: EPDM
Dimension	237 x 194 x 162 mm 9.33 x 7.64 x 6.38 inch
Process temperature	-20 to 55 °C (0 to 130 °F)
Certificates, declarations and approvals	EAC, cCSAus
Input	1 to 4x Memosens digital input 2x 0/4 to 20mA Input optional 2 to 4x Digital input optional
Output / communication	2 to 8x 0/4 to 20 mA current outputs, alarmrelay, 4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Ingress protection	IP66 / IP 67
Measuring principle	Potentiometric / ISE
Characteristic	Robust plastic housing All non-ex applications
Design	2 to 4x Memosens input, 2 to 8x current output Alarmrelay, 4x relay, SD card for software update and copy & paste of setup
Process temperature	-20 to 55 °C (0 to 130 °F)
Application	Modular 4 wire controller Multichannel: 1 to 4 digital channels for Memosens protocol Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity 4 sensors connectable in any combination Functionality modular extendable at any time Plug and play for modules and sensors

4-channel transmitter Liquiline CM444

4-channel transmitter Liquiline CM444

4-channel transmitter Liquiline CM444

Product information

Selection of compatible products

Spare parts and accessories

Related content

Monitoring water quality in fish farms

Toilet flushing with a fresh sea breeze

Firmware for Liquiline 4-wire devices

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

My Endress+Hauser

Products & Services

Industries

Support

Company

4-channel transmitter Liquiline CM444

4-channel transmitter Liquiline CM444

4-channel transmitter Liquiline CM444

Product information

Selection of compatible products

Spare parts and accessories

Related content

Monitoring water quality in fish farms

Toilet flushing with a fresh sea breeze

Firmware for Liquiline 4-wire devices

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

Products & Services

Industries

Support

Company

We value your privacy