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Digital pH sensor
Memosens CPS71E

Memosens CPS71E - pH sensor for chemical processes and poisoning media ©Endress+Hauser
Memosens CPS71E - Suitable for hazardous areas ©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 2.0 pH electrode for chemical processes and poisoning media

Memosens CPS71E is specially designed for demanding processes. Its unique, contamination-resistant reference and its resistance to moisture ensure reliable measurement even in heavily polluted, aggressive media such as strong acids and bases. Thanks to Memosens 2.0 digital technology, CPS71E offers extended storage of calibration and process data providing the perfect basis for predictive maintenance. Pre-calibration in the lab and quick sensor exchange on site maximize process uptime.

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Variable

  • Specs at a glance

    • Measurement range

      Application B:
      • pH: 0 to 14
      Application H:
      • pH: 0 to 12

    • Process temperature

      1 to 140 °C (32 to 284 °F)

    • Process pressure

      0,8 to 14 bar (11,6 to 203 psi) (absolute)

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  • Benefits

    • The electrode's unique ion trap prevents poisoning of the junction and reference, making it resistant to strong acids and bases and ensuring a long sensor lifetime.

    • The optional pressurized reference allows for reliable measurement in blocking media...

  • Field of application

    Processes in chemical industry and monitoring of processes with:

    • High proportion of electrode poisons such as H2S

    • Quickly changing pH values

    With ATEX, IECEx, CSA C/US, NEPSI, Japan, INMETRO approvals for use in hazardous areas, zones 0, 1 and 2.

Features and specifications

Back

Details

  • Measuring principle

    Potentiometric

  • Application

    Process technology and monitoring of processes with:

    • Rapidly changing pH values

    • High proportion of electrode poisons such as H2S

  • Characteristic

    Digital pH electrode for chemical process with an ion trap for poison-resistant reference

  • Measurement range

    Application B:

    • pH: 0 to 14

    Application H:

    • pH: 0 to 12

  • Measuring principle

    Gel compact electrode with ceramic junction and ion trap

  • Design

    All shaft lengths with temperature sensor
    Advanced gel technology

  • Material

    Sensor shaft: Glass to suit process

    pH membrane glass: Type B, Type N

    Metal lead: Ag/AgCl

    Open aperture: Ceramic junction, zirconium dioxide

    O-ring: FKM

    Process coupling: PPS fiber-glass reinforced

    Nameplate: Ceramic metal oxide

  • Dimension

    Diameter: 12 mm (0.47 inch)
    Shaft lengths: 120, 225, 360 and 425 mm
    (4.72, 8.86, 14.2 and 16.7 inch)

  • Process temperature

    1 to 140 °C (32 to 284 °F)

  • Process pressure

    0,8 to 14 bar (11,6 to 203 psi) (absolute)

  • Temperature sensor

    NTC 30k

  • Ex certification

    With ATEX, IECEx, CSA C/US, NEPSI, Japan Ex and INMETRO approvals for use in
    hazardous areas Zone 0, Zone 1 and Zone 2.

  • Connection

    Inductive, contactless connection head with Memosens 2.0 technology

  • Ingres protection

    IP68

  • Additional certifications

    Additional certifications

Documents / Manuals / Software

Accessories / Spare parts

Nr
Order code
Specification
    • Order code 71038228

      Memoclip label Memosens sensor

      for assignment of sensors to measuring loop. 100 sensor clips with printable labels

    • Order code CPY20-

      Technical buffer solution CPY20

      pH quality buffer solution, referenced to primary reference material of PTB and standard reference material of NIST. in DAkkS accredited buffer Laboratory.

    • Order code CPY4-

      KCL-Electrolyte solution CPY4

      For liquid filled electrodes

Downloads