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Digital pH sensor
Memosens CPS31D

Memosens CPS31D - Digital pH sensorfor potable water and swimming pools ©Endress+Hauser
Memosens CPS31D for pH compensation in disinfection processes ©Endress+Hauser

The pH-value of a liquid can be calculated using the potentiometric measurement principle. This video shows what it is about and how this measuring principle works.

Memosens converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection. This video shows how Memosens optimizes process control and maintenance.

Memosens glass electrode for application in drinking water and swimming pools

Memosens CPS31D is the digital expert for pH compensation in disinfection processes. Its three diaphragms make it suitable for minimum conductivity while its low drift guarantees stable measurement. The sensor makes sure that swimming pool water is agreeable and drinking water tasteful. Thanks to Memosens technology, CPS31D combines maximum process and data integrity with simple operation. It resists corrosion and moisture, enables lab calibration and facilitates predictive maintenance.

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  • Avantaje

    • Reliable measurement at minimum conductivity thanks to three diaphragms

    • Low drift by very low level of ion depletion in electrolyte

    • Optional salt ring for extended operating time

    • Maximum process safety through non-contact inductive signal transmission

    • ...

  • Domeniu de aplicare

    • Drinking water

    • Swimming pool water

    • pH compensation for free chlorine measurement

Caracteristici şi specificaţii



  • Measuring principle

    Glass electrode

  • Application

    Drinking water and swimming pool water,
    pH compensation for measuring free chlorine

  • Characteristic

    Standard applications in water, long lifetime

  • Measurement range

    pH 1 to 12

  • Measuring principle

    Gel filled reference with one or three diaphragms, optional saltring

  • Design

    Shaft with temperature sensor

  • Material

    Glass and Ceramic

  • Dimension

    Diameter: 12 mm (0.47 inch)
    Shaft length: 120 mm (4.70 inch)

  • Process temperature

    0 to 80 °C
    (32 to 176 °F)

  • Process pressure

    1 to 4 bar
    (15 to 60 psi)

  • Temperature sensor

    NTC 30k

  • Ex certification


  • Connection

    Memosens plug-in head for digital, non-contact data transmission

  • Ingres protection


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