Name: Liquiline M CM42
Brand: Endress+Hauser
Availability: InStock

1-channel transmitter Liquiline M CM42

Two-wire field device for hazardous and non-hazardous area use in chemicals, life sciences and food

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Memosens converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection. This video shows how Memosens optimizes process control and maintenance.

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1-channel transmitter Liquiline M CM42

Two-wire field device for hazardous and non-hazardous area use in chemicals, life sciences and food

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Benefits

Simple commissioning with quick setup and navigator
The Memosens technology allows plug & play with pre-calibrated Memosens sensors
Less storage thanks to modular design
Predictive maintenance system detects when a sensor has to be cleaned, calibrated or replaced

Integrated technologies

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Product Support Product documentation, troubleshooting articles, device details and more.

FLEXible answers to individual needs

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1-channel transmitter Liquiline M CM42

High-end products
Highly functional and convenient

What is FLEX?

FLEX selections

Technical excellence

Simplicity

Fundamental selection Meet your basic measurement needs

Lean selection Handle your core processes easily

Extended selection Optimize your processes with innovative technologies

Xpert selection Master your most challenging applications

Variable

Learn more about the FLEX selections

Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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24/7 customer portal

Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

Technology

Memosens 2.0: Cutting-edge sensor technology reloaded

Make life easier, increase process safety and stay connected with Memosens 2.0 digital technology.

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Technology

Liquiline: cutting-edge transmitter platform

By choosing the Liquiline platform, you’re effectively choosing to spend less money on stock holding, save installation time and gain operational safety!

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Selection of compatible products

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

RB223 passive barrier

One or two-channel barrier for the safe separation of 4...20 mA standard signal circuits

Product picture field meter RIA46 with control unit

RIA46 process indicator with control unit

4-wire process indicator with control unit as a field device with up to two universal sensor inputs and optional SIL approval

Spare parts and accessories

Housing/housing accessories

Kit CM42:enclosure lowerpartSScpl.M20

Housing/housing accessories

Order code 51517455

Drawing number 22,24

Housing/housing accessories

Kit CM42enclosurelower part SS NPT1/2

Housing/housing accessories

Order code 51517456

Drawing number 22,24

Housing/housing accessories

Kit CM42:enclosure lower partSS G1/2"

Housing/housing accessories

Order code 51517457

Drawing number 22,24

Housing/housing accessories

Kit CM42: case lower part plastic M20

Housing/housing accessories

Order code 71001361

Drawing number 1,5

Spare parts and accessories

Liquiline CM42 documentation

Get the operating instructions for your Liquiline CM42 transmitter here!

More information

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Use the extended configuration to configure from all available options.

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Configuration details

Liquiline M CM42 offers safe measurement in all process applications – even in hazardous areas.

Field transmitter for hazardous areas

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CAD Drawings

Configuration support

Spare parts and accessories

Housing/housing accessories

Kit CM42:enclosure lowerpartSScpl.M20

Housing/housing accessories

Order code 51517455

Drawing number 22,24

Housing/housing accessories

Kit CM42enclosurelower part SS NPT1/2

Housing/housing accessories

Order code 51517456

Drawing number 22,24

Housing/housing accessories

Kit CM42:enclosure lower partSS G1/2"

Housing/housing accessories

Order code 51517457

Drawing number 22,24

Housing/housing accessories

Kit CM42: case lower part plastic M20

Housing/housing accessories

Order code 71001361

Drawing number 1,5

Spare parts and accessories

Selection of compatible products

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

RB223 passive barrier

One or two-channel barrier for the safe separation of 4...20 mA standard signal circuits

RIA46 process indicator with control unit

4-wire process indicator with control unit as a field device with up to two universal sensor inputs and optional SIL approval

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
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
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
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

1-channel transmitter Liquiline M CM42

1-channel transmitter Liquiline M CM42

1-channel transmitter Liquiline M CM42

Product information

Selection of compatible products

Spare parts and accessories

Related content

Liquiline CM42 documentation

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

My Endress+Hauser

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1-channel transmitter Liquiline M CM42

1-channel transmitter Liquiline M CM42

1-channel transmitter Liquiline M CM42

Product information

Selection of compatible products

Spare parts and accessories

Related content

Liquiline CM42 documentation

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

Products & Services

Industries

Support

Company

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