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Memosens CAS41E digital multiparameter sensor

Ion-selective Memosens sensor for reliable real-time monitoring in biological wastewater treatment

Memosens CAS41E digital multiparameter sensor

Ion-selective Memosens sensor for reliable real-time monitoring in biological wastewater treatment

This product is not available in this region.

Please contact your Endress+Hauser sales partner for any further questions.

Benefits

  • Compact multiparameter sensor for efficient monitoring: three configurable electrode slots enable flexible combinations of measurement and compensation electrodes in a single sensor, reducing installation effort and system complexity.
  • Direct in-process installation with fully sealed design: supports real-time monitoring and dynamic process optimization using Memosens technology.
  • Modular configuration with freely assignable slots: allows individual sensor configuration and easy adaptation to new measurement tasks at any time.
  • Easy electrode replacement for simplified maintenance: allows quick and uncomplicated replacement of individual electrodes.
  • Smart multipoint in-process calibration for reliable operation: supports continuous sensor optimization through automated evaluation, integrated self-assessment and in-process calibration without process interruption.

Integrated technologies

Memosens technology
FLEXible answers to individual needs
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Memosens CAS41E digital multiparameter sensor

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What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
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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.

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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.

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Technology
Memosens technology

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

Product information

Memosens CAS41E ISE sensor
Memosens CAS41E ISE multiparamter sensor
Specifications
Measuring / Application task Analyser
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Description

The Memosens CAS41E ISE sensor provides cost-effective, continuous measurement of ammonium, nitrate, potassium or chloride for reliable control of nitrification and denitrification processes. It helps reduce aeration-related energy consumption and supports stable and efficient wastewater treatment within limits. Its smart calibration concept, based on automated evaluation and multipoint in-process calibration, enables continuous sensor optimization with reduced maintenance effort.

Field of application

Designed for biological wastewater treatment applications, particularly in aeration tanks at municipal wastewater treatment plants. It can also be used in selected industrial wastewater treatment and surface water monitoring applications.

Benefits
  • Compact multiparameter sensor for efficient monitoring: three configurable electrode slots enable flexible combinations of measurement and compensation electrodes in a single sensor, reducing installation effort and system complexity.
  • Direct in-process installation with fully sealed design: supports real-time monitoring and dynamic process optimization using Memosens technology.
  • Modular configuration with freely assignable slots: allows individual sensor configuration and easy adaptation to new measurement tasks at any time.
  • Easy electrode replacement for simplified maintenance: allows quick and uncomplicated replacement of individual electrodes.
  • Smart multipoint in-process calibration for reliable operation: supports continuous sensor optimization through automated evaluation, integrated self-assessment and in-process calibration without process interruption.
Downloads
Most downloaded
Operating Instruction (BA)
BA Memosens CAS41E ISE sensor for the continuous measurement of ammonium, nitrate, potassium and chloride
English version - 07/2026
Download
Installation Instructions (EA)
EA Memosens CAS41E Wear parts
English version - 07/2026
Download
Technical Information (TI)
TI Memosens CAS41E ISE sensor for the continuous measurement of ammonium, nitrate, potassium and chloride
English version - 09/2026
Download
All downloads
16 Downloads
Technical Information (TI)
TI Memosens CAS41E ISE sensor for the continuous measurement of ammonium, nitrate, potassium and chloride
English version - 09/2026
Download
Operating Instruction (BA)
Most downloaded
BA Memosens CAS41E ISE sensor for the continuous measurement of ammonium, nitrate, potassium and chloride
English version - 07/2026
Download
Installation Instructions (EA)
EA Memosens CAS41E Combined spare parts instructions
English version - 07/2026
Download
Installation Instructions (EA)
Most downloaded
EA Memosens CAS41E Wear parts
English version - 07/2026
Download
Ex Safety Instruction (XA)
XA Memosens CAS41E NI Class I Div 2 Groups A, B, C, D
Safety instructions for electrical apparatus in explosion-hazardous areas
English version - 10/2026
Download
Innovation (IN)
Real-time data for stable processes Memosens CAS41E provides compact,
continuous measurement for wastewater
and water applications.
English version - 08/2026
Download
Innovation (IN)
Echtzeitdaten für stabile Prozesse Memosens CAS41E ermöglicht kompakte
und kontinuierliche Messungen in
Abwasser- und Wasseranwendungen
English version - 06/2026
Download
Innovation (IN)
Dati in tempo reale per processi affidabili Memosens CAS41E Dati in tempo reale
per processi affidabili
Memosens CAS41E offre una soluzione
compatta per la misura continua in
applicazioni relative alle acque reflue e all'acqua potabile
Italian version - 10/2026
Download
Manufacturer Declaration
Product family: Memosens Product root: CAS41E-
Declaration number: ЕАЭС KZ.7500525.13.12.10690
Manufacturer specification: EMC
Russian version - 08/2026
Download
Manufacturer Declaration
Product family: Memosens Product root: CAS41E-
Declaration number: HE_02300_01.26
Manufacturer specification: Operating conditions
Additional information: MTBF
English version - 07/2026
Download
Manufacturer Declaration
Product family: Memosens Product root: CAS41E-
Declaration number: HE_02335_01.26
Manufacturer specification: RoHS
Additional information: China-RoHS
English version - 05/2026
Download
EU Declaration
Product family: Memosens Product root: CAS41E-
Declaration number: EU_01279_01.26
English version - 07/2026
Download
UK Conformity Assessed
Product family: Memosens Product root: CAS41E-
Declaration number: UK_00604_01.26
English version - 07/2026
Download
Explosion Protection
Product family: Memocheck, Memosens Product root: CAS41E-, CCS50E-, CCS51E-, CCS53E-, CCS55E-, CCS58E-, CLS15E-, CLS16E-, CLS21E-, CLS82E-, COS22E-, COS51E-, COS81E-, C
PF81E-, CPF82E-, CPS11E-, CPS12E-, CPS16E-, CPS31E-, CPS41E-, CPS42E-, CPS47D-, CPS47E-, CPS61E-, CPS62E-, CPS71E-, CPS72E-, CPS76E-
, CPS77D-, CPS77E-, CPS91E-, CPS92E-, CPS96E-, CPS97D-, CPS97E-, CYP02E-, OCPS11E-
Region: USA
Approval agency: CSA
Protection: Cl. I Div. 2, Ex i Cl. I Div. 1
English version - 08/2026
Download
Components sheet
SF for Kit CAS41E air purge with cleaning cage SF for Kit CAS41E air purge with cleaning cage
English version - 04/2026
Download
Components sheet
CS for Memosens CAS41E Components Sheet for CAS41E XPC0033 Wear parts
English version - 07/2026
Download

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Spare parts and accessories

further parts
further parts

CAY40standard solution ISEmaxCAS40/40D

further parts
further parts
Order code CAY40-
further parts
further parts

Wear parts CAS41E

further parts
further parts
Order code XPC0033-
further parts
further parts

Kit CAS41E set O-rings

further parts
further parts
Order code 71765819

Kit CAS41E air purge w/ clean. cage

Order code 71765816
Spare parts and accessories