Technical Data
CompareConductivity
| Measuring Principle | Conductive |
| Application | Chemical processes, pharmaceuticals industry, foodstuff technology, applications in hazardous areas |
| Characteristic | Liquiline M CM42 is a modular two-wire transmitter for all areas of process engineering |
| Measuring principle | Resistance measurement |
| Design | Depending on the ordered version, Liquiline M CM42 has one or two analog current outputs or it can be connected to field busses as per FOUNDATION Fieldbus, PROFIBUS PA and HART protocol |
| Material | Plastic or stainless steel housing with EPDM sealings |
| Dimension | Plastic housing: 144 x 144 x 148 mm 5.67 x 5.67 x 5.83 inch Stainless Steel: 174 x 174 x 134 mm 6.85 x 6.85 x 5.28 inch |
| Temperature sensor | Applicable: Pt100, Pt1000 |
| Ex certification | ATEX, IECEx, FM, CSA, NEPSI, EAC, UKEx, JPN Ex |
| Ingress protection | IP66/67, NEMA 4X |
| Input | One channel transmitter for Memosens and analog (pH, ORP, conductivity) |
| Output / communication | 1/2 x 4 to 20 mA, HART, Profibus PA, FF Additional second output possible, also later |
ORP / Redox
| Measuring Principle | Sensor ORP / Redox |
| Application | Chemical processes, pharmaceuticals industry, foodstuff technology, applications in hazardous areas |
| Characteristic | Liquiline M CM42 is a modular two-wire transmitter for all areas of process engineering |
| Measuring principle | ORP measurement |
| Design | Depending on the ordered version, Liquiline M CM42 has one or two analog current outputs or it can be connected to field busses as per FOUNDATION Fieldbus, PROFIBUS PA and HART protocol |
| Material | Plastic or stainless steel housing with EPDM sealings |
| Dimension | Plastic housing: 144 x 144 x 148 mm 5.67 x 5.67 x 5.83 inch Stainless Steel: 174 x 174 x 134 mm 6.85 x 6.85 x 5.28 inch |
| Temperature sensor | Applicable: Pt100, Pt1000, NTC 30K |
| Ex certification | ATEX, IECEx, FM, CSA, NEPSI, EAC, UKEx, JPN Ex |
| Ingress protection | IP66/67, NEMA 4X |
| Input | One channel transmitter for Memosens and analog (pH, ORP, conductivity) |
| Output / communication | 1/2 x 4 to 20 mA, HART, Profibus, FF Additional second output possible, also later |
Oxygen
| Measuring Principle | Amperometric oxygen measurement |
| Application | Chemical processes, pharmaceuticals industry, foodstuff technology, applications in hazardous areas |
| Characteristic | Liquiline M CM42 is a modular two-wire transmitter for all areas of process engineering |
| Measuring principle | Connection of oxygen sensors with Memosens coupling |
| Design | Depending on the ordered version, Liquiline M CM42 has one or two analog current outputs or it can be connected to field busses as per FOUNDATION Fieldbus, PROFIBUS PA and HART protocol |
| Material | Plastic or stainless steel housing with EPDM sealings |
| Dimension | Plastic housing: 144 x 144 x 148 mm 5.67 x 5.67 x 5.83 inch Stainless Steel: 174 x 174 x 134 mm 6.85 x 6.85 x 5.28 inch |
| Ex certification | ATEX, IECEx, FM, CSA, NEPSI, EAC, UKEx, JPN Ex |
| Ingress protection | IP66/67, NEMA4X |
| Input | One channel transmitter for Memosens and analog (pH, ORP, conductivity) |
| Output / communication | 1/2 x 4 to 20 mA, HART, Profibus PA, FF Additional second output possible, also later |
pH
| Measuring Principle | ISFET |
| Application | Chemical processes, pharmaceuticals industry, foodstuff technology, applications in hazardous areas |
| Characteristic | Liquiline M CM42 is a modular two-wire transmitter for all areas of process engineering |
| Measuring principle | Potentiometric pH measurement |
| Design | Depending on the ordered version, Liquiline M CM42 has one or two analog current outputs or it can be connected to field busses as per FOUNDATION Fieldbus, PROFIBUS PA and HART protocol |
| Material | Plastic or stainless steel housing with EPDM sealings |
| Dimension | Plastic housing: 144 x 144 x 148 mm 5.67 x 5.67 x 5.83 inch Stainless Steel: 174 x 174 x 134 mm 6.85 x 6.85 x 5.28 inch |
| Temperature sensor | Applicable: Pt100, Pt1000, NTC 30K |
| Ex certification | : ATEX, IECEx, FM, CSA, NEPSI, EAC, UKEx, JPN Ex |
| Ingress protection | IP66/67, NEMA 4X |
| Input | One channel transmitter for Memosens and analog (pH, ORP, conductivity) |
| Output / communication | 1/2 x 4 to 20 mA, HART, Profibus PA, FF Additional second output possible, also later |
The CM42 is intended for hazardous areas. For non-hazardous applications, please select the CM442.
The Liquiline M CM42 transmitter is rugged and suitable for pH/ORP, conductivity and dissolved oxygen measurement in a wide range of industrial processes. It is the best choice for demanding applications such as hygienic environments, hazardous areas and functional safety areas. The intuitive Liquiline operating concept simplifies operation, handling and maintenance, saving time. Easy parameter switching and seamless system integration allow flexible and precise adaptation to the measuring task.
Benefits:
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Quick setup with jog dial, simple commissioning
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Pre-calibrated Memosens sensors for plug-and-play
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Modular design reduces spare parts inventory
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Predictive maintenance system detects whether the sensor needs cleaning, calibration or replacement
Application areas:
The Liquiline CM42 transmitter is suitable for process measurement, including the following industries and their utilities:
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Chemical industry
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Food & Beverage
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Life sciences
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Power & Energy
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Oil & Gas
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Primary raw materials & metallurgy
The Liquiline CM42 is compatible with the following communication protocols and interfaces:
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0/4...20 mA
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HART
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PROFIBUS PA
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FOUNDATION Fieldbus
International explosion protection approvals such as IECEx, ATEX, FM, CSA, TIIS and NEPSI; suitable for explosion hazardous areas.
Spare Parts & Accessories 47
47 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 51517455 | ***Kit CM42: enclosure lower part, stainless steel coupling M20(SS = stainless steel version) The article is no longer available. Please order it via the nameplate replacement structure. | Details |
| 51517456 | Kit CM42 enclosure lower part SS NPT1/2(SS = stainless steel version) The article is no longer available. Please order it via the nameplate replacement structure. | Details |
| 51517457 | Kit CM42: enclosure lower part, stainless steel, G1/2"(SS = stainless steel version) The article is no longer available. Please order it via the nameplate replacement structure. | Details |
| 71001361 | ***Kit CM42: case lower part plastic M20The article is no longer available. Please order it via the nameplate replacement structure. | Details |
| 71001362 | Kit CM42: case lower part, plastic, NPT1/2The article is no longer available. Please order it via the nameplate replacement structure. | Details |
| 71001363 | Kit CM42: lower case part, plastic, G1/2The article is no longer available. Please order it via the nameplate replacement structure. | Details |
| 71249342 | CM42: Stainless steel housing with display | Details |
| 51517463 | Washer Assembly(SS = stainless steel version) | Details |
| 71249341 | CM42: Plastic housing with display | Details |
| 51517466 | Input module | Details |
| 51517467 | CM42 Input Module | Details |
| 51517468 | CM42 spare parts | Details |
| 51517469 | CM42: Digital Input Module | Details |
| 51518004 | Input module | Details |
| 51518005 | Input moduleconductivity for conductive sensor, non-Ex version | Details |
| 51518006 | CM42 repair: CD input | Details |
| 51518007 | CM42 Maintenance Spare PartsKit CM42: input module FSDG1, digital for Memosens, non-Ex version. | Details |
| 51517481 | Terminal Assembly | Details |
| 51517482 | Terminal Assembly | Details |
| 51517487 | Terminal Assembly | Details |
Configurator / Comparison
A
Measuring principle video
Click to playSource: public information from the Endress+Hauser website
Manuals & Documents 5
All documents for this modelCase Studies
Municipal Wastewater Treatment · multiparameter — Application Case
Application Context
the inlet, biological and outlet stages of a municipal plant is a typical Municipal Wastewater Treatment duty. The project started from multiparameter, focusing on monitoring several water parameters at one measuring point.
Process Constraints
effluent parameters drift and probes foul with sludge and biofilm, and high solids and corrosive fractions, with large diurnal flow swings only amplify it. The multiparameter specification must therefore cover configured by parameter set, mounting and cleaning needs.
Delivery Approach
Delivery was handled as the analyser range — selecting as part of a complete water-analysis system. Execution centred on configured by parameter set, mounting and cleaning needs, together with stable compliance with Grade 1A discharge limits and online data reporting.
Field Results
Operation shows the benefit clearly — one point replacing several single-parameter units, saving capex and upkeep, with confidence in this measuring point improving markedly.
Food & Beverage · multiparameter — Application Case
Customer Profile
The typical setting in Food & Beverage is dosing, pasteurising, filling and CIP stages. The measuring point is multiparameter; the focus is monitoring several water parameters at one measuring point.
Key Difficulties
Conditions are syrups, dairy and beverages that scale easily, under strict hygienic requirements and, on top of that, frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, which a standard configuration cannot handle for long. The design therefore starts with configured by parameter set, mounting and cleaning needs.
Implementation
The scope ran through the analyser range: selecting as part of a complete water-analysis system. Technically it hinges on configured by parameter set, mounting and cleaning needs, and on these requirements: food-safety and hygienic design per 3-A / EHEDG.
Customer Benefit
In practice this means one point replacing several single-parameter units, saving capex and upkeep, which cut the workload on the site maintenance team.
Chemical & Pharmaceutical · multiparameter — Application Case
Project Background
The project covers reactors, metering vessels and finished-product tanks. The work centres on multiparameter and the core task is monitoring several water parameters at one measuring point.
Operating Challenges
The medium and duty are characterised by highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. So multiparameter cannot be specified generically — it calls for configured by parameter set, mounting and cleaning needs.
Solution
The Ainstru engineering team worked through the analyser range: selecting as part of a complete water-analysis system. The configuration involves configured by parameter set, mounting and cleaning needs, with these requirements in view: Ex certification and GMP traceability of records.
Results
Since start-up the system has run steadily; the practical result is one point replacing several single-parameter units, saving capex and upkeep.
Power & Energy · multiparameter — Application Case
Project Overview
The site is boiler feedwater, turbine condensate and FGD/DeNOx systems. The customer wanted multiparameter properly configured on the existing plant, with the aim of monitoring several water parameters at one measuring point.
Technical Challenges
What actually causes trouble is high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. All of this means the multiparameter configuration has to involve configured by parameter set, mounting and cleaning needs.
Configuration
Supply and installation were organised through the analyser range: selecting as part of a complete water-analysis system. On site this meant configured by parameter set, mounting and cleaning needs, checked line by line against: compliance with power-industry codes and unit availability targets.
Performance
After commissioning the outcome is one point replacing several single-parameter units, saving capex and upkeep, and the readings are now used for process tuning.
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