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

4-channel transmitter
Liquiline CM444

Expandable multiparameter field device for all industries

CM444

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

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

Specs at a glance

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

See all specifications

Field of application

The Liquiline CM444 transmitter allows you to connect up to 4 Memosens sensors of your choice from over 12 measurement parameters. It offers automatic sensor recognition, flexible expandability, and standardized spare parts with all other devices of the Liquiline platform. With its inputs, outputs, controllers, and math modules, you can even control cleaning systems or dosing pumps. Heartbeat Technology helps you find the ideal balance between measuring point availability and maintenance costs.

Liquiline CM444 is suitable for all industries and their utilities, such as:

Food & Beverages
Life Sciences
Power & Energy
Water & Wastewater
Chemicals
Marine

It features the following communication protocols and interfaces:

0/4...20 mA
HART
PROFIBUS DP
Modbus RS485/RTU
Modbus TCP
EtherNet/IP
PROFINET
Webserver

The transmitter can be extended with a module whose explosion protection approvals, such as IECEx, ATEX, and CSA, allow the connection of sensors installed in hazardous areas.

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.

Videos

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.

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
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

Extended selection

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

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Predecessor

CCM360

Sludge level CUM750

Success stories

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
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
Could also interest you

Media
Firmware for Liquiline 4-wire devices

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

Related topics
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

About us
Liquiline production

A high degree of automation combined with expert craftsmanship ensures highly efficient production of the various device versions. We can tailor your device exactly to your needs.
More information

Related topics
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

Related topics
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

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)
Ingress protection

IP66 / IP 67
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
Additional certifications

EAC, cCSAus

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)
Ingress protection

IP66 / IP 67
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
Additional certifications

EAC, cCSAus

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)
Ingress protection

IP66 / IP 67
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
Additional certifications

EAC, cCSAus

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)
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, Etherne
Additional certifications

EAC, cCSAus

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)
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
Additional certifications

EAC, cCSAus

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)
Ingress protection

IP66 / IP 67
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
Additional certifications

EAC, cCSAus

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)
Ingress protection

IP66 / IP 67
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
Additional certifications

EAC, cCSAus

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
Output / communication

2 to 8x 0/4 to 20 mA current outputs, alarmrelay,
4x relay, ProfibusDP, Modbus RS485, Modbus TCP, Ethernet
Input

1 to 4x Memosens digital input
2x 0/4 to 20mA Input optional
2 to 4x Digital input optional

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11/03/2025
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04/07/2022
03/05/2022

Language:	English
Version:	11/03/2025
File size:	5.9 MB
File name:	TI00444CEN_2825-00.pdf

	EN
11/03/2025
28/08/2024
10/08/2022
04/07/2022
03/05/2022

Language:	English
Version:	11/03/2025
File size:	5.9 MB
File name:	TI00444CEN_2825-00.pdf

Language:	English
Version:	30/05/2022
File size:	3.3 MB
File name:	BA01245CEN_0822-00.pdf

	EN
30/05/2022
28/02/2019

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27/06/2013
15/09/2011

	EN
19/03/2025
25/09/2023
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04/07/2022
08/10/2021

	EN
25/09/2023
12/08/2022
08/10/2021
06/05/2021
30/11/2019

4-channel transmitter Liquiline CM444

Expandable multiparameter field device for all industries

Specs at a glance

Input

Output / communication

Ingress protection

Field of application

Benefits

Videos

Memosens 2.0: Cutting-edge sensor technology reloaded

Smart instrumentation through Heartbeat Technology

Extended selection

Predecessor

Success stories

Monitoring water quality in fish farms

Toilet flushing with a fresh sea breeze

Could also interest you

Firmware for Liquiline 4-wire devices

Liquiline: cutting-edge transmitter platform

Liquiline production

Memosens 2.0: Cutting-edge sensor technology reloaded

Smart instrumentation through Heartbeat Technology

Measuring principle

Application

Characteristic

Design

Material

Dimension

Process temperature

Ingress protection

Input

Output / communication

Additional certifications

Measuring principle

Application

Characteristic

Design

Material

Dimension

Process temperature

Ingress protection

Input

Output / communication

Additional certifications

Measuring principle

Application

Characteristic

Design

Material

Dimension

Process temperature

Ingress protection

Input

Output / communication

Additional certifications

Measuring principle

Application

Characteristic

Design

Material

Dimension

Process temperature

Input

Output / communication

Additional certifications

Measuring principle

Application

Characteristic

Design

Material

Dimension

Process temperature

Input

Output / communication

Additional certifications

Measuring principle

Application

Characteristic

Design

Material

4-channel transmitter
Liquiline CM444