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CA75 DPD analyzer module for total and free chlorine in drinking water, wastewater, process water

CA75 DPD analyzer module for total and free chlorine

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

CA75
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DPD analyzer module
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©Endress+Hauser
DPD analyzer module open
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DPD analyzer module open
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©Endress+Hauser

Specs at a glance

  • 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)

  • Process pressure

    0.3 bar (4.4 psi) to 5.2 bar (75.4 psi), up to the point of sample preparation.

  • 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.

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