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Digital non-glass pH sensor Memosens CPS77D

Memosens CPS77D – Digital ISFET sensor for food and life sciences industries ©Endress+Hauser

Memosens CPS77D with improved CIP stability

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 ISFET electrode for food and life sciences industries

Memosens CPS77D is the digital specialist for hygienic applications. Its bacteria-proof reference with contamination-resistant gel guarantees stable measurements. The sensor is sterilizable with hot steam, autoclavable and features an unbreakable PEEK shaft assuring highest product safety. In addition, the Memosens digital technology combines maximum process and data integrity with simple handling. It resists corrosion and moisture, enables lab calibration and facilitates predictive maintenance.

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  • Benefits

    • Unbreakable for highest product safety

    • Certified biocompatibility

    • Suitable for hot steam sterilization and autoclaving

    • Low maintenance thanks to long calibration intervals

    • Six times higher CIP stability compared to conventional ISFET pH sensors

    • Optional...

  • Field of application

    Hygienic and sterile applications:

    • Food industry
    • Life sciences
    • Biotechnology

    With all relevant approvals for hygienic applications such as EHEDG, 3A, EU1935/2004, USP 87/88.

Features and specifications



  • Measuring principle

    ISFET sensor

  • Application

    Hygienic and sterile applications, food industry, pharmaceutical industry, biotechnology

  • Characteristic

    Sterilizable and autoclavable ISFET sensor for pH measurement
    Digital with Memosens technology

  • Reference

    Double chamber reference system

  • Measurement range

    pH 0 to 14

  • Material

    Sensor shaft: PEEK
    Seals: FFKM
    Junction: ceramic

  • Dimension

    Diameter: 12 mm (0.47 inch)
    Shaft lengths: 120, 225 and 360 mm
    (4.72, 8.86 and 14.2 inch)

  • Process temperature

    -15 to 135°C (5 to 275°F)

  • Process pressure

    Max. 11 bar abs at 100 °C
    (Max. 160 psi at 212 °F)

  • Temperature sensor


  • Connection

    Inductive, digital connection head with Memosens technology

  • Ingres protection

    IP 68 (10 m (33 ft) water column, 25 °C (77 °F), 45 days

  • Additional certifications

    3-A, FDA compatible
    EHEDG Typ EL Class I aseptic
    ASME BPE-2018
    Regulation (EC) No. 1935/2004
    USP <87>, USP <88> Class VI, 121 °C (250 °F)

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