E+H Liquiline CM42B 2-Wire Transmitter

Reliable Liquid Analysis for Demanding Process Environments

The Endress+Hauser Liquiline CM42B 2-wire transmitter is a top-tier liquid analysis device engineered to satisfy the rigorous monitoring requirements of global process industries. Built to handle continuous liquid measurement tasks—including pH, ORP, conductive and inductive conductivity, as well as amperometric or optical dissolved oxygen—the CM42B transmitter ensures maximum operational uptime, stringent safety compliance, and reliable process control in harsh environment conditions.

Versatile Modular Design and Enclosure Options

Designed with modular versatility at its core, the Liquiline CM42B transmitter accommodates diverse field mounting setups and harsh industrial environments. Plant engineers can select high-grade polycarbonate enclosures for chemical applications, polished hygienic stainless steel housings for life sciences and food production facilities, or compact DIN-rail units intended for control cabinet skids. Its loop-powered 2-wire setup significantly simplifies field wiring while delivering continuous 4 to 20 mA signals, with optional secondary outputs and HART communication capabilities for full integration into modern Distributed Control Systems (DCS) and asset management software.

Cutting-Edge Memosens Digital Sensor Technology

A fundamental strength of the Liquiline CM42B lies in its seamless support for Memosens 2.0 digital sensor technology. Memosens non-contact inductive signal connection completely eliminates problems caused by moisture, corrosion, and environmental contamination at the sensor head. Because calibration data and process history are stored directly inside the smart Memosens sensor head, technicians can calibrate sensors safely in lab environments prior to field installation. When a sensor is connected, the CM42B automatically recognizes the sensor type and parameter configuration, reducing commissioning time to a matter of seconds.

Enhanced Safety and Wireless Connectivity

Safety and usability are further elevated through smart connectivity options and international certifications. The CM42B transmitter holds worldwide hazardous area approvals (Ex ia), making it suitable for intrinsically safe installations in Zone 0 and Zone 1 explosive atmospheres. Users can interact with the instrument directly using the high-contrast display module or configure process parameters remotely via password-protected Bluetooth LE wireless connectivity using smartphones or tablets with the SmartBlue app.

Application

• Chemical & Petrochemical Processes: Monitoring pH, ORP, and inductive conductivity in corrosive or hazardous process fluids and reactors.

• Pharmaceutical & Life Sciences: Ultra-pure water (WFI) conductivity monitoring and bioreactor pH/dissolved oxygen control under strict hygienic standards.

• Water & Wastewater Treatment: Continuous quality monitoring of effluent discharge, drinking water purification, and aeration basin oxygen control.

• Food & Beverage Production: Hygienic line monitoring during CIP/SIP clean-in-place sequences and product filling lines.

Technical Parameters

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

• Compatible Parameters: pH, ORP, Conductive Conductivity, Inductive Conductivity, Amperometric Dissolved Oxygen, Optical Dissolved Oxygen

• Sensor Interface: Memosens digital protocol or analog sensor input

• Signal Output / Communication: Current output 1: 4 to 20 mA (passive, HART optional); Current output 2 (optional): 4 to 20 mA (passive)

• Housing Options: High-grade Polycarbonate (IP66/67, NEMA 4X), Stainless Steel 316L (IP66/67, NEMA 4X), or DIN-rail (IP20)

• Power Supply: Loop-powered via 4 to 20 mA loop (17 V DC to 30 V DC)

• Ambient Temperature Range: -20 °C to +60 °C (-4 °F to +140 °F) depending on Ex classification and housing

• Explosion Protection / Certificates: ATEX, IECEx, C/US, CHN-Ex (Intrinsically Safe Ex ia)

FAQ

• Q: What liquid analysis parameters can the Liquiline CM42B measure? A: The transmitter measures pH, ORP, conductive conductivity, inductive conductivity, amperometric oxygen, and optical dissolved oxygen using compatible sensors.

• Q: What are the main benefits of using Memosens digital sensors with the CM42B? A: Memosens sensors provide non-contact inductive signal transfer immune to moisture, allow off-site lab calibration, and feature auto-recognition upon connection to the CM42B.

• Q: Can the CM42B transmitter be installed in hazardous area environments? A: Yes, the CM42B holds intrinsically safe Ex approvals including ATEX, IECEx, and C/US for Zone 0 and Zone 1 hazardous area applications.

• Q: Do you supply original Endress+Hauser transmitters with factory documentation? A: Yes, as an international instrument distributor, we supply original Endress+Hauser Liquiline CM42B units complete with manufacturer certificates and technical documentation upon request.

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