E+H Liquiline Compact CM72 2-Wire Transmitter

Space-Saving In-Line Liquid Analysis Solution

The Endress+Hauser Liquiline Compact CM72 is a highly space-efficient, 1-channel liquid analysis transmitter tailored for process engineering applications where cabinet space or field mounting real estate is constrained. Designed to connect directly to digital Memosens sensors via a blue inductive plug-in head, the CM72 converts raw analytical data into a continuous, galvanically isolated 4 to 20 mA output signal. It supports key liquid analytical parameters—including pH, ORP, conductive conductivity, and dissolved oxygen—providing precise process feedback for industrial automation networks.

Plug-and-Play Operation with Fixed Factory Configuration

A standout feature of the Liquiline Compact CM72 is its pre-configured, zero-commissioning operational concept. The parameter type and measuring range scale are defined upon ordering, meaning the transmitter is immediately ready to function out of the box. By eliminating complex menu navigation, display configuration, and parameter programming in the field, plant managers ensure total protection against accidental misconfiguration and significantly reduce installation labor costs.

Rugged Build Quality and Memosens Digital Superiority

Constructed with a highly chemical-resistant PEEK housing (PEEK 151) and EPDM strain relief, the CM72 carries robust ingress protection ratings (IP67, IP68, and NEMA Type 6). This enables continuous operation under harsh ambient conditions, including extreme dust, moisture exposure, rain, and outdoor temperature fluctuations ranging from -20 °C to +85 °C. Coupled with Memosens digital technology, the inductive signal transfer eliminates signal distortion caused by ambient humidity or cable corrosion, ensuring maximum data availability and enabling off-site sensor calibration in laboratory environments.

Seamless PLC Integration and On-Site Diagnostics

Despite its miniature size, the Liquiline CM72 includes built-in diagnostic intelligence. An integrated dual-color LED (Red/Green) continuously displays the health status of both the transmitter and connected Memosens sensor directly at the measuring point. Operating on standard 12.6 to 30 V DC loop power, the 2-wire transmitter easily connects directly to Programmable Logic Controllers (PLCs), Distributed Control Systems (DCS), or field indicators (such as RIA15 / RIA46), making it a cost-effective and dependable choice for skid builders and plant retrofit projects.

 Application

• Water & Wastewater Management: Compact level and water quality monitoring in pumping stations, filtration skids, and effluent channels.

• Life Sciences & Biotechnology: Space-critical inline process monitoring in bioreactors, purified water lines, and clean utility skids.

• Chemical & Utility Processes: Neutralization systems, cooling tower water monitoring, and compact dosing skid systems.

• Food & Beverage Production: Quality monitoring of liquid process lines and washdown utility systems.

Technical Parameters

• Device Type: Ultra-compact 1-channel, 2-wire loop-powered analytical transmitter

• Input Interface: Digital Memosens protocol (inductive connection head)

• Output Signal: 4 to 20 mA (loop-powered, galvanically isolated)

• Supported Parameters & Ranges:

  • pH: 0 to 14 pH

  • ORP: -1500 mV to +1500 mV

  • Conductive Conductivity: 0 to 20 µS/cm up to 0 to 500 mS/cm (version dependent)

  • Dissolved Oxygen: 0 to 200 µg/l up to 0 to 20 mg/l (version dependent)

• Housing Material: PEEK 151 (Cover & Housing), EPDM Strain Relief, PEEK 450 G Axial Ring

• Ingress Protection: IP67, IP68, NEMA Type 6

• Operating Voltage: 12.6 to 30 V DC (2-wire system)

• Ambient Temperature: -20 °C to +85 °C (-4 °F to +185 °F)

• Certificates & Approvals: CE, CSA C/US GP (Hazardous area versions ATEX / IECEx available)

FAQ

• Q: Does the Liquiline Compact CM72 require local parameter programming? A: No. The CM72 is pre-configured at the factory according to your specified order code, making it immediately ready for plug-and-play field installation.

• Q: What is the main benefit of using the CM72 transmitter over standard field transmitters? A: Its ultra-compact form factor allows it to fit directly inside or adjacent to sensor assemblies, saving cabinet space and reducing installation costs in space-constrained skids.

• Q: How does the CM72 indicate sensor or system error status? A: It features an integrated red/green status LED that provides visual diagnostic feedback on transmitter health and Memosens sensor signal status.

• Q: Do you supply authentic Endress+Hauser units with factory documentation? A: Yes, as an international instrument distributor, we supply 100% genuine Endress+Hauser Liquiline CM72 units along with original factory documentation and manufacturer certificates.

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