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Analog non-glass pH sensor
Tophit CPS491

ISFET electrode for heavily polluted media in chemical processes, paper or paint production

  • Tophit CPS491- Analog non-glass pH electrode for heavily soiled media ©Endress+Hauser
  • Tophit CPS491- Analog non-glass pH sensor for chemical processes, paper and paint production ©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.

Tophit CPS491 is the analog specialist for fibrous media or media with a high content of suspended solids such as dispersions, precipitation reactions or emulsions. Its unbreakable shaft ensures a long operating life while the open aperture prevents fouling and guarantees reliable measurement under harsh process conditions.


  • Unbreakable for highest product safety

  • Open aperture for application in heavily soiled media

  • Application possible at low temperatures

  • Low maintenance thanks to long calibration intervals

Field of application

  • Chemical processes

  • Pulp and paper industry

  • Contaminated media and suspended solids
    - Dispersions
    - Precipitation
    - Emulsions

With ATEX, FM, and CSA approval for application in hazardous areas.

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