
Specs at a glance
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Measurement range
Trace: 0 to 5 mg/l HOCl
Standard: 0 to 20 mg/l HOCl
High: 0 to 200 mg/l HOCl -
Process temperature
0 to 55 °C (32 to 130 °F), non-freezing
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Process pressure
Max. 1 bar (max. 14.5 psi)
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Measuring method
Closed, membrane covered measuring cell
Reduction of free chlorine at the cathode
Field of application
Memosens CCS51D is a robust, low-maintenance sensor for free chlorine. It provides high-precision measurement with long-term stability in drinking water, pool and process water and ensures consistent disinfection monitoring even at low water volumes. The free chlorine sensor features extremely fast response times guaranteeing efficient process control and safe processes. Thanks to Memosens digital technology, CCS51D combines maximum process and data integrity with simple operation.
Memosens CCS51D is a free chlorine sensor for skid builders and end customers. It measures reliably in:
Drinking water - to ensure reliable disinfection
Process water - for hygienic and safe packaging and bottling of products
Utilities - to detect the absence or presence of free chlorine
Pool water - to dose disinfectant efficiently
Benefits
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The right sensor version for every application: From trace measurement up to free chlorine concentrations of 200 mg/l.
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Fast response time (t90 < 25 s) provides an accurate process view and enables prompt reaction to process changes as well as efficient process control.
Increased process safety: precise and long-term stable measurement ensures consistent process monitoring and allows for individually adapted disinfectant dosing.
The low-maintenance, amperometric sensor reduces the cost of ownership of the measuring point, particularly compared to colorimetric measuring systems.
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More process up-time thanks to fast sensor exchange: pre-calibrate the sensor in your lab and then swap it into your process with plug & play.
Connection to the Liquiline multiparameter transmitter allows for easy combination with other relevant parameters of liquid analysis such as pH and ORP.
Videos
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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
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Fundamental selection Meet your basic measurement needs |
Technical excellence
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Simplicity
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Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
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Extended selection Optimize your processes with innovative technologies |
Technical excellence
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Simplicity
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Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Extended selection
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

Predecessor
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Technical Information (TI)
Memosens CCS51D Technical Information
English version - 09/2018
Digital sensor with Memosens technology for determining free chlorine
EN 20/09/2018Language:
English
Version:
20/09/2018
File size:
752.9 KB
File name:
TI01423CEN_0118.pdf
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Operating Instruction (BA)
CCS51D
English version - 07/2020
Digital sensor with Memosens technology for determining free chlorine
EN 20/07/202010/12/201920/09/2018Language:
English
Version:
20/07/2020
File size:
1.4 MB
File name:
BA01906CEN_0320.pdf
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Technical Information (TI)
Memosens CCS51D Technical Information
Digital sensor with Memosens technology for determining free chlorine
EN 20/09/2018Language:
English
Version:
20/09/2018
File size:
752.9 KB
File name:
TI01423CEN_0118.pdf
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Operating Instruction (BA)
CCS51D
Digital sensor with Memosens technology for determining free chlorine
EN 20/07/202010/12/201920/09/2018Language:
English
Version:
20/07/2020
File size:
1.4 MB
File name:
BA01906CEN_0320.pdf
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PU (Publication)
Disinfection applications
Measuring ranges and suitable sensors
Language:
English
Version:
04/03/2021
File size:
1.3 MB
File name:
PU01405CEN-Disinfection-sensor-application-lowres.pdf
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Fields of Activities (FA)
Expertise in liquid analysis
From sensors to complete turnkey solutions
EN 21/09/2022Language:
English
Version:
21/09/2022
File size:
1.2 MB
File name:
FA01018CEN_0422_Analysis_Portfolio_lowres.pdf
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Competence Brochure (CP)
Aus Freude an gutem Wasser
Frische Ideen für Wasserwerke, Verteilernetze,Oberflächenwasser und Industrieanlagen
Language:
German
Version:
17/06/2020
File size:
3.2 MB
File name:
CP01335CDE_0119_Kompetenz in Wasser.pdf
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Competence Brochure (CP)
For the love of quality water
Fresh ideas for waterworks, distribution networks, surface waters and industrial plants.
Language:
English
Version:
17/06/2019
File size:
3.2 MB
File name:
CP01335CEN_0119_Competence in water.pdf
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Case Study (CS)
Safeguarding health with clean water
Disinfection and monitoring of drinking water
EN 28/07/2022Language:
English
Version:
28/07/2022
File size:
734.9 KB
File name:
CS01718CEN_0122_Safeguarding health with clean water.pdf
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Case Study (CS)
Une mesure de chlore libre pour le suivi de la désinfection de l’eau
Le Syndicat des Eaux de Basse-Vigneulles et Faulquemont fait confiance aux platines d’analyse d’Endress+Hauser
Language:
French
Version:
17/06/2021
File size:
358.2 KB
File name:
CS01658X-SEBVF-BD.pdf
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Case Study (CS)
Trinkwasser-Überwachung bei Grossveranstaltung
Für die 30’000 Teilnehmer des Pfadilagers im BuLa muss Trinkwasser in einwandfreier Qualität zur Verfügung gestellt werden. Mit der Netilion-Lösung kann die Kontrolle zeit- und ortsunabhängig erfolgen.
Language:
German
Version:
12/10/2022
File size:
833.5 KB
File name:
CS01708S20DE01.22_00_BULA_.pdf
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Case Study (CS)
Free chlorine measurement for monitoring water disinfection
Trusted analysis panels for drinking water
Language:
English
Version:
17/06/2021
File size:
500.8 KB
File name:
CS01658_Free chlorine measurement for monitoring water disinfection.pdf
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Case Study (CS)
Messung des freien Chlors zur Überwachung der Wasserdesinfektion
Bewährte Analysepanels für Trinkwasser
Language:
German
Version:
17/06/2021
File size:
698.3 KB
File name:
CS01658_Messung des freien Chlors zur Ueberwachung der Trinkwasserdesinfektion.pdf
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Innovation (IN)
Désinfection efficace et sûre
Mesure précise et stable à long terme du chlore libre avec Memosens CCS51D
Language:
French
Version:
04/12/2018
File size:
569.1 KB
File name:
IN01132CFR_0118.pdf
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Innovation (IN)
Safe, efficient disinfection
Precise and long-term stable measurement of free chlorine with Memosens CCS51D
Language:
English
Version:
04/12/2018
File size:
651.6 KB
File name:
IN01132CEN_CCS51D_lowres.pdf
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Innovation (IN)
Sichere, effektive Desinfektion
Präzise und langzeitstabile Messung von freiem Chlor mit Memosens CCS51D
Language:
German
Version:
17/12/2018
File size:
756.6 KB
File name:
IN01132CDE_CCS51D_lowres.pdf
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Electrolytes
CCV05-50x_51x (Russia)
Electrolyte for CCS50(D)/CCS51(D)
Language:
Russian
Version:
29/04/2022
File size:
187.3 KB
File name:
MSDS_CCV05-50x_51x_(RUS).pdf
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Electrolytes
CCV05-50x_51x (Saudi Arabien)
Electrolyte for CCS50(D)/CCS51(D)
Language:
Arabic
Version:
29/04/2022
File size:
168.8 KB
File name:
MSDS_CCV05-50x_51x_(SAA).pdf
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Electrolytes
CCV05-50x_51x (Belgium (Dutch))
Electrolyte for CCS50(D)/CCS51(D)
Language:
Dutch
Version:
29/04/2022
File size:
42.1 KB
File name:
MSDS_CCV05-50x_51x_(BNL).pdf
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Electrolytes
CCV05-50x_51x (Poland)
Electrolyte for CCS50(D)/CCS51(D)
Language:
Polish
Version:
29/04/2022
File size:
188.1 KB
File name:
MSDS_CCV05-50x_51x_(PL).pdf
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Electrolytes
CCV05-50x_51x (Spain)
Electrolyte for CCS50(D)/CCS51(D)
Language:
Spanish
Version:
29/04/2022
File size:
42.4 KB
File name:
MSDS_CCV05-50x_51x_(E).pdf
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Electrolytes
CCV05-50x_51x (Switzerland)
Electrolyte for CCS50(D)/CCS51(D)
Language:
German
Version:
29/04/2022
File size:
42.5 KB
File name:
MSDS_CCV05-50x_51x_(CH).pdf
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