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Liquiline CM442

1-/2-channel transmitter

Expandable multiparameter field device for all industries

Liquiline CM442 is a digital multiparameter transmitter for process monitoring and controlling in any application. The 1-/2-channel controller saves you time and money by offering seamless system integration, simple operation and a reduced need for spare part stock. Liquiline CM442 provides you with all the benefits of a best-in-class transmitter platform from clever simplicity to maximum process safety.



  • Clever simplicity:
    One controller for all parameters and applications, intuitive user interface, automatic sensor recognition, hot plug & play with pre-calibrated Memosens sensors.

  • High flexibility:
    Universal modules for all parameters minimize spare part stock and allow for easy 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.


Field of application

The Liquiline CM442 multiparameter transmitter is suitable for all applications in non-hazardous areas, for example in these industries and their utilities:

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

Liquiline CM442 features all common communication protocols and interfaces, such as:

  • 0/4...20 mA
  • HART
  • Modbus TCP / Modbus RS485
  • EtherNet/IP
  • Webserver

Features and specifications

  • Application

    Modular 4 wire controller
    Multichannel: 1/2 digital channels for Memosens protocol
    Multiparameter: pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity
    Two 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

    2x Memosens input, 2 to 4x current output, Alarmrelay
    2x 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 7.38 inch

  • Process temperature

    -20 to 60 °C (0 to 140 °F)

  • Ingres protection

    IP66 / IP67

  • Input

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

  • Output

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

  • Additional certifications


Sensors for CM442

pH value or ORP

pH measurement in drinking


• Retractable assembly Cleanfit


• Sensor Orbisint CPS11D

• Measuring cable CYK10

ORP in drinking water

• Dipfit CYA112 immersion


• Sensor Orbisint CPS12D

• Measuring cable CYK10


Inductive conductivity

measurement in wastewater


• Sensor Indumax CLS50D

• Sensor fixed cable

Conductive conductivity

measurement in power plant

cooling water

• Sensor Condumax CLS15D

• Measuring cable CYK10


Oxygen in aeration basins

• Dipfit CYA112 immersion


• Holder CYH112

• Sensor

– COS61D (optical) with fixed

cable (→ Fig.)

– COS51D (amperometric),

cable CYK10

Turbidity and interface

Turbidity in industrial water

• Sensor Turbimax CUS51D with

fixed cable (→ Fig.)

• Assembly Flowfit CUA250

• Spray head CUR3 (optional)

Interface in the primary clarifier

• Sensor Turbimax CUS71D

• Assembly CYA112

• Holder CYH112

Nitrate and SAC

Nitrate in wastewater

• Sensor CAS51D-**A2 with fixed


• Dipfit CYA112 immersion


• Holder CYH112

SAC in the wastewater treatment


• Sensor CAS51D-**2C2 with

fixed cable

• Dipfit CYA112 immersion


• Holder CYH112


Free available chlorine (and pH) in

drinking water

• Sensor CCS142D

• Sensor CPS11D

• Measuring cable CYK10

• Flow assembly CCA250

Ion-selective electrodes

Ammonium and nitrate

measurement in the aeration basin

• Sensor CAS40D with fixed cable

• Holder CYH112




  • Technical Data
  • Operation Manual
  • Operation Manual Communication via HART