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Orthophosphate analyzer
Liquiline System CA80PH

Liquiline System CA80PH - High-precision process analyzer for orthophosphate measurement ©Endress+Hauser
Liquiline System CA80PH orthophosphate analyzer with cooling for extended reagent lifetime ©Endress+Hauser
Sample collector with level detection for the monitoring of sample transport ©Endress+Hauser

Orthophosphate concentration in a liquid can be measured using the colorimetric measuring principle. This video shows what it is about and how this measuring principle works.

Colorimetric system for wastewater monitoring and optimization of process control

Liquiline System CA80PH offers online orthophosphate measurement for precise dosing of precipitants in wastewater treatment. As all Liquiline System analyzers, it enables plug & play of up to 4 Memosens sensors - minimizing the installation effort. Automatic calibration and cleaning and the low consumption of reagents save you operating costs. Advanced diagnostics with remote access ensure process safety and support you in providing process documentation to the authorities.

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  • Benefits

    • Fast commissioning and plug & play thanks to Memosens technology and user-friendly operation

    • Easy upgrade of functionality - even to a complete measuring station - simply by adding modules and connecting Memosens sensors

    • Advanced diagnostics with...

  • Field of application

    Liquiline System CA80PH supports you in optimizing the cleaning capacity of wastewater treatment plants. It monitors and controls:

    • Precipitant dosing in aeration basins

    • Wastewater treatment plant outlets

    In industrial applications, Liquiline System...

Features and specifications



  • Measuring principle


  • Characteristic

    Process analyzer for orthophosphate in aqueous solutions
    Comply with standard colorimetric measuring principle, molybdenum blue method, following DIN EN 1189 or molybdate vanadate method

  • Size

    793 x 530 x 417 mm
    31.22 x 20.87 x 16.42 inch
    Stand housing:
    1723 x 930 x 654 mm
    67.83 x 36.61 x 25.74 inch

  • Design

    Open design, cabinet and stand housing
    High-Performance plastic ASA-PC, additional stand coated steel

  • Process temperature

    4 to 40 °C (39.2 to 104 °F)

  • Ambient temperature

    5 to 40 °C (41 to 104 °F)

    Outdoor version: - 20 to 40 °C (-4 to 104 °F)

  • Process pressure

    At atmospheric pressure, < 0.2 bar

  • Sample flow rate

    Min. 5 ml/min (0.17 fl.oz/min)

  • Consistency of the sample

    Suspended solids content
    Turbitity < 50 NTU, aqueous, homogenized

  • Application

    Monitoring and optimization of the cleaning capacity of municipal and industrial waste water treatment plants

  • Power supply

    100 to 120 VAC / 200 to 240 VAC ± 10%
    24 VDC ± 10%
    50 ± 1 or 60 ± 1,2 Hz

  • Output

    2x 0/4 to 20 mA
    Modbus RS485/TCP

  • Input

    1 or 2 measuring channel
    1 to 4 digital sensor inputs for sensors with Memosens protocol (optional)

  • Measurement range

    0.05 to 2.5 mg/l PO4-P (blue method)

    0.05 to 10 mg/l PO4-P (blue method)

    0.05 to 10 mg/l with dilution function to maximum 2.5 to 500 mg/l PO4-P (blue method)

    0.5 to 20 mg/l PO4-P (yellow method)

    0.5 to 50 mg/l PO4-P (yellow method)

    0.5 to 50 mg/l with dilution function to maximum 10 to 1000 mg/l PO4-P (yellow method)

  • Consumables

    Reagents and standard solutions CY80H as well as cleaner CY800 (blue method) are necessary for the operation
    Regular maintenance is done with the parts of the maintenance kit CAV800

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