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Sample preparation Liquiline System CAT820

In-situ filtration system for sampling in wastewater treatment plants and surface waters

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Sample preparation Liquiline System CAT820

In-situ filtration system for sampling in wastewater treatment plants and surface waters

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Benefits

  • Fast commissioning and plug & play thanks to Memosens technology and user-friendly Liquiline operating concept
  • Cost-effective through tool-free maintenance and easy replacement of filter elements
  • Advanced diagnostics with remote access for increased process safety
  • Optional back-flush function for extended maintenance intervals and minimized effort
  • Various mounting options for perfect fit to the application
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.

Learn more

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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Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

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.

My Endress+Hauser – all in one place

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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Product information

Liquiline System CAT820 - Sample preparation system for aeration, outlets, surface waters
Sample preparation system
Specifications
Measuring / Application task Analyser
No results found Try adjusting your search terms to see more results.
Description

Liquiline System CAT820 provides clear samples directly from your process. Equipped with Memosens technology, it simplifies commissioning and supports predictive maintenance. Easy cleaning of the special membrane surface and tool-free maintenance reduce your operating costs. CAT820 can be combined with the modular Flexdip holder to facilitate adaption to your process. It is fully controlled by the Liquiline System analyzer, allowing perfect synchronization of your measuring point.

Field of application

Liquiline System CAT820 is designed for:

  • Aeration basins and outlets of municipal and industrial wastewater treatment plants
  • Surface waters
  • Taking aqueous samples from industrial processes
Benefits
  • Fast commissioning and plug & play thanks to Memosens technology and user-friendly Liquiline operating concept
  • Cost-effective through tool-free maintenance and easy replacement of filter elements
  • Advanced diagnostics with remote access for increased process safety
  • Optional back-flush function for extended maintenance intervals and minimized effort
  • Various mounting options for perfect fit to the application
Predecessors
Downloads
Most downloaded
Operating Instruction (BA)
Liquiline System CAT820 Automatic sample conditioning system for supplying process measuring
devices with filtered sample from sludge activation, secondary
clarification or surface water
English version - 07/2021
Download
Technical Information (TI)
Liquiline System CAT820 Technical Information Automatic sample conditioning system for supplying process measuring
devices with filtered sample from sludge activation, secondary
clarification or surface water
English version - 02/2016
Download
Installation Instructions (EA)
EA Sample preparation systems CAT820/860 Maintenance
English version - 09/2025
Download
The CAD Drawings will be available after the configuration.
All downloads
179 Downloads
Technical Information (TI)
Most downloaded
Liquiline System CAT820 Technical Information Automatic sample conditioning system for supplying process measuring
devices with filtered sample from sludge activation, secondary
clarification or surface water
English version - 02/2016
Download
Operating Instruction (BA)
Most downloaded
Liquiline System CAT820 Automatic sample conditioning system for supplying process measuring
devices with filtered sample from sludge activation, secondary
clarification or surface water
English version - 07/2021
Download
Installation Instructions (EA)
EA Sample preparation systems CAT820/860 Maintenance
English version - 09/2025
Download
Installation Instructions (EA)
EA CA8x/CAT8xx Hose connector
English version - 06/2025
Download
Installation Instructions (EA)
Kit manual for sample preparation systems CAT8xx Filter Kit manual for sample preparation systems CAT8xx Filter - two-sided
English version - 01/2026
Download
Installation Instructions (EA)
Kit Mastbefestigung Post mounting kit 71096920 Installation Instructions Kit Mastbefestigung
English version - 02/2017
Download
Installation Instructions (EA)
EA Sample preparation systems CAT820/860 Electronics compartment
English version - 05/2025
Download
Competence Brochure (CP)
良質な水のために 上水道、配水網、地表水、工業プラント向けの斬新なアイデア
Japanese version - 05/2025
Download
Competence Brochure (CP)
Volledig beheer van uw afvalwater Volledig beheer van uw afvalwater
Welke uitdagingen heeft u ?
Dutch version - 10/2022
Download
Competence Brochure (CP)
Gestion globale de vos eaux usées Gestion globale de vos eaux usées
Quels sont vos défis ?
French version - 10/2022
Download
Competence Brochure (CP)
Aus Freude an gutem Wasser Frische Ideen für Wasserwerke, Verteilernetze, Oberflächenwasser und
Industrieanlagen
German version - 07/2023
Download
Competence Brochure (CP)
For the love of quality water Fresh ideas for waterworks, distribution networks, surface waters and
industrial plants.
English version - 07/2023
Download
Case Study (CS)
En conformité avec la directive-cadre UE sur l‘eau et la loi WHG (loi fédérale allemande sur l’eau) Élimination sûre et facile du phosphate
French version - 01/2024
Download
Case Study (CS)
Optimierte Diagnose und Wartung mit "Connected Support" Kläranlagen testen den CA80-Analysator mit Cloud-basierter Support-Plat.
German version - 08/2021
Download
Case Study (CS)
Safe phosphate elimination with minimal effort Compliance with the EU Water Framework Directive and the WHG
English version - 09/2022
Download
Case Study (CS)
Case study: Plaatfilter zorgt voor lagere onderhoudskosten bij RWZI Utrecht Plaatfilter verlaagt onderhoudskosten bij RWZI Utrecht
Dutch version - 07/2025
Download
Innovation (IN)
High-precision nutrient analysis at critical control points Liquiline System CA80AM and CA80PH analyzers and sample preparation
systems
English version - 06/2015
Download
Innovation (IN)
Liefern Sie sicheres Wasser Präzise Nitrit-, Eisen- und Aluminiumanalyse mit Liquiline System CA80
German version - 05/2017
Download
Innovation (IN)
Supply safe water High-precision analysis of nitrite, iron and aluminum with Liquiline
System CA80
English version - 04/2017
Download
Reagents/standard solutions/cleaner for analyzer
CY820-1+UA (China) cleaning concentrate oxidized
Chinese version - 05/2022
Download
Reagents/standard solutions/cleaner for analyzer
CY820-1+UA (Romania) cleaning concentrate oxidized
Romanian version - 05/2022
Download
Reagents/standard solutions/cleaner for analyzer
CY820-1+UA (Poland) cleaning concentrate oxidized
Polish version - 05/2022
Download
Reagents/standard solutions/cleaner for analyzer
CY820-1+UA (United Kingdom) cleaning concentrate oxidized
English version - 05/2022
Download
Reagents/standard solutions/cleaner for analyzer
CY820-1+UA (India) cleaning concentrate oxidized
English version - 05/2022
Download

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Spare parts and accessories

further parts
further parts

cleaner CY820

further parts
further parts
Order code CY820-
further parts
further parts

Kit CAT820/860: 1 year of maintenance

further parts
further parts
Order code 71326150
Drawing number 241
further parts
further parts

Kit CAT820/860: 3 years of maintenance

further parts
further parts
Order code 71229924
Drawing number 241
further parts
further parts

Kit CAT820/860: filter candle 0,1um

further parts
further parts
Order code 71222181
Drawing number 205
Spare parts & accessories
Liquiline System CAT820 - Sample preparation system for aeration, outlets, surface waters
Sample preparation system

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Add your product to the cart and request a quote. Whether it is un-configured, partially configured, or fully configured, our experts will contact you to complete the configuration and provide your quote.

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Spare parts and accessories

further parts
further parts

cleaner CY820

further parts
further parts
Order code CY820-
further parts
further parts

Kit CAT820/860: 1 year of maintenance

further parts
further parts
Order code 71326150
Drawing number 241
further parts
further parts

Kit CAT820/860: 3 years of maintenance

further parts
further parts
Order code 71229924
Drawing number 241
further parts
further parts

Kit CAT820/860: filter candle 0,1um

further parts
further parts
Order code 71222181
Drawing number 205
Spare parts & accessories

Selection of compatible products

/