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Digital non-glass pH sensor
Tophit CPS441D

Memosens ISFET electrode for the chemical, life sciences and food industries

  • Tophit CPS441D - Digital non-glass pH sensor with refillable liquid KCl electrolyte ©Endress+Hauser
  • Tophit CPS441D for media with high organic solvents content ©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 CPS441D is the digital high performer for media with low conductivity or high organic solvents content. Designed for fast response, it accurately measures even in fast-changing medium compositions. Its unbreakable shaft ensures best safety of your products. Thanks to Memosens digital technology, CPS441D 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

  • Resistant to poisoning thanks to constant refilling of KCl bridge electrolyte and separate reference lead

  • Suitable for sterilization

  • 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

Media with a high amount of organic solvents or very low conductivities:

  • Chemical industry including precipitation reactions or dispersions (pressurized version)

  • Power plants, e.g. boiler feed water

  • Life sciences, e.g. water for injection

With 3A, ATEX, FM and CSA approval suitable for hygienic applications or hazardous areas.

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