Specs at a glance
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Measuring range
0 to 10 mg/l free chlorine or 0 to 10 mg/l total chlorine
LOD: 0.018 mg/l -
Process temperature
5 to 40 °C (41 to 104 °F)
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Process pressure
0.3 bar (4.4 psi) to 5.2 bar (75.4 psi), up to the point of sample preparation.
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Measuring method
DPD (N,N-Diethyl-p-phenylenediamine) method in accordance with US EPA 40 CFR 141.74, US EPA 40 CFR 136.3, US EPA 334.0, ISO 7393-2 and 4500-CL-G
Field of application
The CA75 DPD analyzer module enables reliable monitoring of total or free chlorine in applications where precise, absolute measurement is required. It complies with regulations calling for the standardized, officially accepted DPD method.
Drinking water: to ensure reliable disinfection while preventing overdosing
Wastewater treatment plants: for monitoring effluent and enabling water reuse
Process water: for reliable chlorine detection and protection against damage
Food industry: to ensure hygienic filling processes and high product quality (e.g. in wash water) and to protect membranes in reverse osmosis systems
Swimming pools: for efficient disinfectant dosing
Note: The CA75 always requires a Liquiline CM44x transmitter.
Benefits
Meets regulatory requirements worldwide – thanks to the officially accepted DPD method.
Save space and costs: Expand your measuring point with additional Memosens sensors (e.g., for pH or turbidity measurement).
Seamless integration via fieldbus protocols such as Modbus RTU, PROFIBUS DP, EtherNet/IP, and more.
Easy commissioning: Connect the DPD analyzer module to a Liquiline CM44x transmitter like a plug-and-play sensor.
Low maintenance thanks to factory calibration: No regular calibration required and optimized OPEX through adjustable measuring intervals.
Reagent levels at a glance: Transparent door for quick visual check.
Extended selection
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High-end products
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Technical excellence
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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
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Variable
| FLEX selections | Technical excellence | Simplicity |
|---|---|---|
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
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Simplicity
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Extended selection Optimize your processes with innovative technologies |
Technical excellence
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Xpert selection Master your most challenging applications |
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Success stories
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Technical Information (TI)
TI DPD analyzer module CA75
Measurement of free chlorine or total chlorine using the DPD method
EN 06/07/2026Language:
English
Version:
06/07/2026
File size:
1.3 MB
File name:
TI01893CEN_0126-00.pdf
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Operating Instruction (BA)
BA DPD analyzer module CA75
Measurement of free chlorine or total chlorine using the DPD method
EN 25/06/2026Language:
English
Version:
25/06/2026
File size:
1.9 MB
File name:
BA02616CEN_0126-00.pdf
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Installation Instructions (EA)
EA DPD analyzer module CA75
Maintenance kit CAV750
EN 10/06/202621/04/2026Language:
English
Version:
10/06/2026
File size:
1.2 MB
File name:
EA01806CEN_0226-00.pdf
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Installation Instructions (EA)
EA DPD analyzer module CA75
Spare parts
EN 06/07/2026Language:
English
Version:
06/07/2026
File size:
2.4 MB
File name:
EA01807CEN_0126-00.pdf
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Special Documentation (SD)
SD CY75
Mixing the reagents
For analyzer module CA75EN 23/07/2026Language:
English
Version:
23/07/2026
File size:
255 KB
File name:
SD03599CEN_0126-00.pdf
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Special Documentation (SD)
SD DPD analyzer module CA75
Maintenance booklet
EN 11/05/2026Language:
English
Version:
11/05/2026
File size:
340.7 KB
File name:
SD03540CEN_0126-00.pdf
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Innovation (IN)
Compliant with regulatory standards worldwide
DPD analyzer module for online
monitoring of free or total chlorineLanguage:
English
Version:
22/07/2026
File size:
1.2 MB
File name:
CA75_IN01485CEN_eBrochure.pdf
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Innovation (IN)
Normgerechte Chlorüberwachung
Erfüllen Sie weltweit regulatorische Anforderungen mit dem DPD
Analysatormodul CA75 und überwachen Sie Ihre Desinfektionsprozesse
zuverlässig.Language:
German
Version:
19/08/2026
File size:
1.2 MB
File name:
CA75_IN01485CDE_eBrochure.pdf
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Innovation (IN)
Monitoraggio del cloro conforme alle norme
Monitoraggio del cloro
conforme alle norme
Soddisfate i requisiti internazionali con il
modulo analizzatore DPD CA75 per un
monitoraggio affidabile della disinfezione.Language:
Italian
Version:
02/10/2026
File size:
12.3 MB
File name:
CA75_IN01485CIT_eBrochure.pdf
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Reagents/standard solutions/cleaner for analyzer
CY75-ALSATE (Czech Republic)
Standard solution CY75DPD Total Chlorine
Language:
Czech
Version:
18/08/2026
File size:
0 B
File name:
MSDS_CY75-ALSATE_(CZ).pdf
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