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Digital non-glass pH sensor
Tophit CPS491D

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

  • Tophit CPS491D - Digital non-glass pH electrode for heavily soiled media ©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.

Tophit CPS491D is the specialist for fibrous media or media with a high content of suspended solids such as dispersions, precipitation, emulsions. Its unbreakable shaft ensures a long operating life while the open aperture guarantees reliable measurement under harsh process conditions. Thanks to Memosens digital technology, CPS491D combines maximum process and data integrity with simple operation. It resists corrosion and moisture, enables lab calibration and facilitates predictive maintenance.


  • 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

  • Maximum process safety through non-contact inductive signal transmission

  • Enables predictive maintenance due to storage of sensor and process-specific data

  • Reduced operating costs due to minimized process downtime and extended sensor lifetime

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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Endress+Hauser Inc.
2350 Endress Place Greenwood , IN 46143 United States
Tel.: 888-363-7377
Fax: 317-535-8498
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