Starting at $585.93
  • Usually ships in 4-6 weeks



  • Measuring principle:
    • Potentiometric
    • Gel-compact electrode with ceramic junction
  • Measurement range: 1 to 13 pH
  • Temperature sensor: NTC 30K
  • Process temperature: 5 to 176°F (–15 to 80°C)
  • Process pressure: 11.6 to 58 psi (0.8 to 4 bar) absolute
  • Material(s):
    • Sensor shaft: glass to suit process
    • pH membrane: glass Type A
    • Metal lead Ag/AgCl
    • Open aperture: ceramic junction
    • O-ring: FKM
    • Process coupling: PPS fiber-glass reinforced
    • Nameplate: ceramic metal oxide
  • All shaft lengths with temperature sensor
  • Optional salt storage
  • Very low ion depletion of electrolyte
  • IP68
  • ATEX, IECEx, CSA C/US, NEPSI, Japan Ex, and INMETRO approvals


The E+H Memosens CPS31E Digital pH Sensor is designed for drinking and swimming water treatment applications, with a gel-filled reference and ceramic junction suitable for accurate pH monitoring of medias of low conductivity. Minimum drift occurs in the sensor thanks to low ion depletion in the electrolyte. Salt storage comes optional with each unit for longer operating time. Extended storage of calibration and process allows for more accurate trend identification and expanded predictive maintenance, with secure digital transfer of historical data via Memosens 2.0 technology. The non-contact, inductive signal transmission method of the CPS31E ensures maximum process safety.

E+H Memosens CPS31E Digital pH Sensor applications:

  • Drinking water
  • Swimming pool water
  • pH compensation during the measurement of free chlorine