Endress Hauser Multichannel transmitter Liquiline CM44P
The Liquiline CM44P is a universal four-wire multichannel transmitter from Endress+Hauser, designed for connecting process photometers and Memosens digital sensors. As the first transmitter to combine both optical sensors and Memosens sensors on a single platform, it enables complete measuring point setup for demanding processes such as chromatography, fermentation, phase separation, and filtration.
Key Features and Benefits
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Unique Hybrid Sensor Combination: The CM44P allows simultaneous connection of up to 2 process photometers and up to 4 Memosens sensors of your choice, measuring up to 16 different parameters from 6 analytical sensors. This combination capability simplifies complex measurement tasks that previously required multiple transmitters.
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Optimized for Critical Processes: The transmitter is especially suited for chromatography, fermentation, filtration, and phase separation. In chromatography, combining a UV photometer with pH and conductivity measurements ensures accurate product detection and buffer quality verification. In fermentation, photometer measurement with pH and dissolved oxygen helps achieve optimal growth conditions.
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Intelligent Design and Flexible I/O: One controller handles all parameters including process photometers, with 2 to 8 current outputs, alarm relay, and 4 relays. Optional digital or analog inputs/outputs allow adaptation to various applications.
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Seamless System Integration: Communication protocols include 0/4…20 mA, HART, PROFIBUS DP, Modbus RS485/TCP, EtherNet/IP, and PROFINET, plus an integrated web server for remote access via any browser.
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Heartbeat Technology: Enables status-oriented maintenance and easy verification of the entire measuring point, helping find the ideal balance between measurement point availability and maintenance costs.
Technical Specifications (at a Glance)
| Specification | Detail |
|---|---|
| Sensor Inputs | 1 to 2x process photometer; 0 to 4x Memosens digital input |
| Measured Parameters | Up to 16 parameters (UV, NIR/VIS absorption, turbidity, pH/ORP, conductivity, dissolved oxygen, etc.) |
| Outputs | 2 to 8x 0/4…20 mA current outputs; alarm relay; 4x relay |
| Communication | HART, PROFIBUS DP, Modbus RS485/TCP, EtherNet/IP, PROFINET, web server |
| Housing Material | PC-FR (housing base & DIN rail housing); EPDM (seals) |
| Ingress Protection | Field device: IP66/67; External display: IP66; Cabinet device: IP20 |
| Certifications | cCSAus, IECEx, ATEX |
The Liquiline CM44P delivers reliable, flexible multichannel measurement for demanding analytical processes, combining hybrid sensor capability, expandable architecture, and advanced diagnostic power through Heartbeat Technology.
Endress Hauser Multichannel transmitter Liquiline CM44P
The Liquiline CM44P is a universal four-wire multichannel transmitter from Endress+Hauser, engineered for connecting process photometers and Memosens digital sensors. As the first transmitter to combine both optical sensors and Memosens sensors on a single platform, it enables complete measuring point setup for demanding processes such as chromatography, fermentation, phase separation, and filtration.
The transmitter’s core capability is its unique hybrid sensor combination. It accepts inputs from up to two process photometers and four Memosens sensors simultaneously, measuring up to 16 different parameters from six analytical sensors. Sensor types supported include pH, ORP, conductivity, dissolved oxygen, nitrate, turbidity, free chlorine, and ion-selective sensors. Mathematical functions allow the CM44P to calculate measured values based on multiple input values, enabling up to six “virtual” process values such as pH calculation from two conductivity values or rH value based on pH and ORP inputs.
The CM44P is especially suited for demanding analytical processes. In chromatography, combining a UV process photometer with pH and conductivity measurement ensures accurate detection of the target product and verifies buffer quality, leading to optimum product yield. The transmitter also detects the transition from product to cleaning phase, allowing optimization of cleaning and flushing cycles. In fermentation, photometer measurement with pH and dissolved oxygen helps achieve optimal growth conditions for microorganisms. For filtration, combining turbidity and dissolved oxygen measurement provides an accurate overview of the process, indicating product purity and whether oxygen has penetrated the process.
The transmitter performs diagnostics on all connected sensors and analyzers, transmitting error messages according to NE107 categories. Diagnostic functions include monitoring pH glass impedance, measuring signal stagnation, monitoring electrode condition and aging, checking overcurrent conditions, and comparing conductivity and temperature values against USP and EP specifications for pharmaceutical water.
Communication options are extensive, including 0/4…20 mA, HART, PROFIBUS DP, Modbus RS485/RTU, Modbus TCP, EtherNet/IP, PROFINET, and an integrated web server. The web server allows operators to remotely view diagnostic data, perform configurations, or access device parameters in any web browser, even via smartphone. The transmitter can be extended with an Ex module whose approvals (IECEx, ATEX, CSA) allow connection of sensors installed in hazardous areas.
The CM44P interfaces to all Memosens sensors from Endress+Hauser and other vendors. Sensor-related data stored directly in the sensor head can be accessed for analysis, mathematical calculations, and diagnostic purposes. Data can be stored in a tamper-proof database or SD card, exported to CSV, and logged with up to 150,000 entries in up to eight logbooks. All settings and logbooks are stored in non-volatile memory for retention during power failure. Memosens lab-calibrated sensors and hot plug-and-play allow fast commissioning.
The transmitter is available as a field device (IP66/67) or cabinet device (IP20), with an external display option (IP66). Housing materials include PC-FR base and DIN rail housing with EPDM seals. The CM44P holds cCSAus, IECEx, and ATEX certifications. Heartbeat Technology enables status-oriented maintenance and easy verification of the entire measuring point, helping optimize maintenance efforts and maximize plant availability.
The Liquiline CM44P delivers reliable, flexible multichannel measurement for demanding analytical processes, combining hybrid sensor capability, expandable architecture, and advanced diagnostic power through Heartbeat Technology.