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Sample preparation
Liquiline System CAT820

Liquiline System CAT820 - Sample preparation system for aeration, outlets, surface waters ©Endress+Hauser
Liquiline System CAT820 - Flexible sample preparation system combined with Flexdip holder ©Endress+Hauser

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

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.

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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...

  • 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

Features and specifications



  • Measuring principle


  • Characteristic

    Automatic sample preparation system for supplying process measuring devices with filtered samples

  • Size

    194 x 237 x 162 mm
    7.64 x 9.33 x 6.38 in
    (h x w x d)

  • Design

    Back-flush filter system with various filter mounting options: float, chain and immersion pipe
    Full compatibility to holder CYH112

  • Process temperature

    4 to 40 °C (39 to 104 °F)

  • Ambient temperature

    Unheated: 5 to 50 °C (41 to 122 °F)
    Heated: -20 to 50 °C (-4 to 122 °F)

  • Process pressure


  • Specials

    Optional back-flush with pressurizd air (version with Memosens-Technology)
    Controling and parametrization via Liquiline System CA80
    Stand-alone version with time-control available

  • Application

    Sampling from aeration tank and secondary clarification of municipal and industrial wastewater treatment plants
    Sampling of aqueous media from industrial processes

  • Power supply

    100 to 120/200 to 240 V AC 10%, 50/60 Hz

  • Consumables

    Cleaner CY820 for filter and hoses

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