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CA75 DPD analyzer module for total and free chlorine

Colorimetric analyzer module for online monitoring of drinking water, wastewater and process water

CA75 DPD analyzer module for total and free chlorine

Colorimetric analyzer module for online monitoring of drinking water, wastewater and process water

This product is not available in this region.

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

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.
FLEXible answers to individual needs
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CA75 DPD analyzer module for total and free chlorine

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Technical excellence
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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.

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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Product information

Specifications
Measuring / Application task Disinfection
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Description

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.

Field of application
  • 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.
Downloads
Most downloaded
Operating Instruction (BA)
BA DPD analyzer module CA75 Measurement of free chlorine or total chlorine using the DPD method
English version - 06/2026
Download
Technical Information (TI)
TI DPD analyzer module CA75 Measurement of free chlorine or total chlorine using the DPD method
English version - 07/2026
Download
Installation Instructions (EA)
EA DPD analyzer module CA75 Maintenance kit CAV750
English version - 06/2026
Download
All downloads
218 Downloads
Technical Information (TI)
TI DPD analyzer module CA75 Measurement of free chlorine or total chlorine using the DPD method
English version - 07/2026
Download
Operating Instruction (BA)
Most downloaded
BA DPD analyzer module CA75 Measurement of free chlorine or total chlorine using the DPD method
English version - 06/2026
Download
Installation Instructions (EA)
EA DPD analyzer module CA75 Maintenance kit CAV750
English version - 06/2026
Download
Installation Instructions (EA)
EA DPD analyzer module CA75 Spare parts
English version - 07/2026
Download
Special Documentation (SD)
SD CY75 Mixing the reagents
For analyzer module CA75
English version - 07/2026
Download
Special Documentation (SD)
SD DPD analyzer module CA75 Maintenance booklet
English version - 05/2026
Download
Innovation (IN)
Normgerechte Chlorüberwachung Erfüllen Sie weltweit regulatorische Anforderungen mit dem DPD
Analysatormodul CA75 und überwachen Sie Ihre Desinfektionsprozesse
zuverlässig.
German version - 08/2026
Download
Innovation (IN)
Compliant with regulatory standards worldwide DPD analyzer module for online
monitoring of free or total chlorine
English version - 07/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-AKSCTA (Belgium (Dutch)) Reagent set for CA75 Free Chlorine
Dutch version - 05/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-AKSCTA (Lithuania) Reagent set for CA75 Free Chlorine
05/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-AKSCTA (South Korea) Reagent set for CA75 Free Chlorine
Korean version - 05/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-AKSCTA (United Kingdom) Reagent set for CA75 Free Chlorine
English version - 05/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (United Kingdom) Reagent set for CA75DPD Total Chlorine
English version - 03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-AKSCTA (India) Reagent set for CA75 Free Chlorine
English version - 05/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (Greece) Reagent set for CA75DPD Total Chlorine
03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (India) Reagent set for CA75DPD Total Chlorine
English version - 03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (New Zealand) Reagent set for CA75DPD Total Chlorine
English version - 03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (Norway) Reagent set for CA75DPD Total Chlorine
Norwegian version - 03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (Ireland) Reagent set for CA75DPD Total Chlorine
English version - 03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (Latvia) Reagent set for CA75DPD Total Chlorine
03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (Malta) Reagent set for CA75DPD Total Chlorine
English version - 03/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-AKSCTA (Türkiye) Reagent set for CA75 Free Chlorine
Turkish version - 05/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-AKSCTA (Portugal) Reagent set for CA75 Free Chlorine
Portuguese version - 05/2026
Download
Reagents/standard solutions/cleaner for analyzer
CY75-ALSDTA (Switzerland) Reagent set for CA75DPD Total Chlorine
German version - 03/2026
Download

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FAQ

Spare parts and accessories

further parts
further parts

CAV750 Maintenance kit CA75 DPD

further parts
further parts
Order code CAV750-
further parts
further parts

Reagent / Standard Solution CY75

further parts
further parts
Order code CY75-
further parts
further parts

Cleaner CY800

further parts
further parts
Order code CY800-
further parts
further parts

Kit CA75 sample valve (2 pcs)

further parts
further parts
Order code 71753406
Spare parts and accessories