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Digital free chlorine sensor Memosens CCS51E

Memosens sensor for drinking water, pool and process water as well as utilities in all industries

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Digital free chlorine sensor Memosens CCS51E

Memosens sensor for drinking water, pool and process water as well as utilities in all industries

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Benefits

  • The low-maintenance, amperometric sensor reduces the cost of ownership of the measuring point, particularly compared to colorimetric measuring systems.
  • Increased process up-time: pre-calibration of the sensor allows for real plug & play and faster polarization time thanks to Memosens 2.0 technology.
  • Fast response time (t90 < 25 s) provides an accurate process view and enables prompt reaction to process changes as well as efficient process control.
  • High process safety and efficient dosing: precise and long-term stable measurement ensures consistent process monitoring and permits individually adapted disinfectant dosing.
  • Suitable sensor versions for every measurement range: From trace measurement up to free chlorine concentrations of 200 mg/l.
  • Connection to the Liquiline multiparameter transmitter facilitates easy combination with other parameters of liquid analysis such as pH and ORP.

Integrated technologies

Memosens technology
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Digital free chlorine sensor Memosens CCS51E

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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.

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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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.

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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.

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Technology
Memosens 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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Product information

Digital disinfection sensor for free chlorine
Memosens CCS51E
Memosens CCS51E free chlorine sensor
Specifications
Measuring / Application task Disinfection
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Description

Memosens CCS51E ensures precise and consistent disinfection monitoring in drinking water, pool and process water and in utilities. This sensor for determining free chlorine features extremely fast response times even at low water volumes. This guarantees efficient process control and safe processes. Thanks to Memosens 2.0 technology, CCS51E combines maximum process and data integrity with simple operation. This provides the perfect basis for predictive maintenance and IIoT connectivity.

Field of application

The free chlorine sensor Memosens CCS51E is suitable for a wide range of water qualities:

  • Drinking water: to secure disinfection
  • Utilities: to detect free chlorine and avoid any damage
  • Process water: for hygienic and safe packaging and bottling of products in food processing
  • Pool water: to dose disinfectant efficiently
Benefits
  • The low-maintenance, amperometric sensor reduces the cost of ownership of the measuring point, particularly compared to colorimetric measuring systems.
  • Increased process up-time: pre-calibration of the sensor allows for real plug & play and faster polarization time thanks to Memosens 2.0 technology.
  • Fast response time (t90 < 25 s) provides an accurate process view and enables prompt reaction to process changes as well as efficient process control.
  • High process safety and efficient dosing: precise and long-term stable measurement ensures consistent process monitoring and permits individually adapted disinfectant dosing.
  • Suitable sensor versions for every measurement range: From trace measurement up to free chlorine concentrations of 200 mg/l.
  • Connection to the Liquiline multiparameter transmitter facilitates easy combination with other parameters of liquid analysis such as pH and ORP.
Predecessors
Downloads
Most downloaded
Technical Information (TI)
TI Memosens CCS51E Digital sensor with Memosens technology for determining free chlorine
English version - 01/2026
Download
Operating Instruction (BA)
BA Memosens CCS51E Digital sensor with Memosens technology for determining free chlorine
English version - 09/2023
Download
Installation Instructions (EA)
EA CCV05 kit For CCS5x sensors (D/E)
English version - 04/2026
Download
The CAD Drawings will be available after the configuration.
All downloads
85 Downloads
Technical Information (TI)
Most downloaded
TI Memosens CCS51E Digital sensor with Memosens technology for determining free chlorine
English version - 01/2026
Download
Operating Instruction (BA)
Most downloaded
BA Memosens CCS51E Digital sensor with Memosens technology for determining free chlorine
English version - 09/2023
Download
Installation Instructions (EA)
EA CCV05 kit For CCS5x sensors (D/E)
English version - 04/2026
Download
Installation Instructions (EA)
EA Kits CCV05 for disinfection Spare parts kits CCV05 for disinfection sensors
English version - 01/2026
Download
Ex Safety Instruction (XA)
XA Memosens disinfection sensors NI Class I Div 2 Groups A, B, C, D T6
Ex ic IIC T6 Gc
Class I Zone 2 AEx ic IIC T6 Gc
Safety instructions for electrical apparatus in explosion-hazardous areas
English version - 04/2026
Download
PU (Publication)
Infographic disinfection portfolio Infographic on disinfection sensors with Memosens 2.0 technology
German version - 06/2024
Download
PU (Publication)
Infografika portfolia dezinfekce Infografika o dezinfekčních senzorech s technologií Memosens 2.0
Czech version - 10/2024
Download
PU (Publication)
Infographic disinfection portfolio Infographic on disinfection sensors with Memosens 2.0 technology
English version - 06/2024
Download
PU (Publication)
Disinfection applications Measuring ranges and suitable sensors
English version - 06/2023
Download
PU (Publication)
Desinfektionsanwendungen Messbereiche und geeignete
Sensoren
German version - 11/2023
Download
Competence Brochure (CP)
殺菌アプリケーションにおける水質モニタリング 上水道施設、排水処理施設、産業用の清浄かつ安全な水の確保
Japanese version - 07/2024
Download
Competence Brochure (CP)
Desinfektion ist überall Sauberes und sicheres Wasser für Wasserwerke, Kläranlagen und Industrie
German version - 09/2023
Download
Competence Brochure (CP)
La disinfezione ci riguarda da vicino Acqua pulita e sicura per acquedotti, depuratori e industrie
Italian version - 03/2024
Download
Competence Brochure (CP)
Disinfection is all around us Clean and safe water for waterworks, wastewater treatment plants and ind
English version - 06/2023
Download
Innovation (IN)
eBrochure Memosens disinfection portfolio eBrochure Memosens disinfection portfolio
German version - 06/2024
Download
Innovation (IN)
eBrožura Memosens Dezinfekční portfolio eBrožura Memosens Dezinfekční portfolio
Czech version - 10/2024
Download
Innovation (IN)
L’eau propre et sûre, c’est la vie ! Mesure continue de la désinfection
avec les capteurs numériques Memosens
pour le dioxyde de chlore, le chlore libre,
le chlore total, le brome libre et l’ozone.
French version - 12/2024
Download
Innovation (IN)
Clean water is life! Continuous disinfection measurement
with the digital Memosens sensors for
chlorine dioxide, free chlorine, total
chlorine, free bromine and ozone
English version - 06/2024
Download
Innovation (IN)
L‘acqua è vita! L‘acqua è vita!
Misura continua della disinfezione con i sensori digitali Memosens
Italian version - 09/2024
Download
Electrolytes
CCV05-50x_51x (Switzerland (Italian)) Electrolyte for CCS50(D)/CCS51(D)
Italian version - 02/2025
Download
Electrolytes
CCV05-50x_51x (New Zealand) Electrolyte for CCS50(D)/CCS51(D)
English version - 02/2025
Download
Electrolytes
CCV05-50x_51x (Switzerland) Electrolyte for CCS50(D)/CCS51(D)
German version - 02/2025
Download
Electrolytes
CCV05-50x_51x (Austria) Electrolyte for CCS50(D)/CCS51(D)
German version - 02/2025
Download
Electrolytes
CCV05-50x_51x (Greece) Electrolyte for CCS50(D)/CCS51(D)
02/2025
Download

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further parts
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Maintenance kits CCV05

further parts
further parts
Order code CCV05-
further parts
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100 pcs. of DPD tablet Nr. 1

further parts
further parts
Order code 50035461

Kit adapter CCS5x(D/E) for CCA250

Order code 71372025

Kit adapter CCS5x(D/E) for CYA112

Order code 71372026
Spare parts & accessories
Digital disinfection sensor for free chlorine
Memosens CCS51E
Memosens CCS51E free chlorine sensor

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Spare parts and accessories

further parts
further parts

Maintenance kits CCV05

further parts
further parts
Order code CCV05-
further parts
further parts

100 pcs. of DPD tablet Nr. 1

further parts
further parts
Order code 50035461

Kit adapter CCS5x(D/E) for CCA250

Order code 71372025

Kit adapter CCS5x(D/E) for CYA112

Order code 71372026
Spare parts & accessories

Selection of compatible products

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