• Measuring ranges:
    • 0 to 14 pH
    • 5 to 230°F (-15 to 110°C)
  • 5 to 158°F (–15 to 70°C) ambient temperature range
  • Pressure-temperature ratings:
    • Maximum: 160 psia / 212°F (11 bar abs / 100°C)
    • Sterilizable: 58 psia / 230°F (4 bar abs / 110°C), 1 h
  • 10 μS/cm minimum conductivity
  • ±0.01 pH repeatability
  • IP68 protection


The E+H CPS97D pH sensor is designed for fibrous media or media with a high content of suspended solids such as dispersions, precipitation, emulsions. The sensor's unbreakable PEEK shaft ensures product safety and a long operating life. The CPS97D also features an open aperture and a chemically stable reference gel for long-term, stable measurements under harsh process conditions.

The CPS97D offers longer calibration intervals than glass electrodes, which results in lower hysteresis with alternating temperatures, low measuring error following exposure to high temperatures, and almost no acid and alkaline errors. It also allows direct installation into the process, saving time and costs for sampling and laboratory analysis. The sensor can be used for clean-in-place (CIP) processes when combined with an automatic retractable assembly.

Sensors with Memosens technology offer greater process and data safety, easy handling, and predictive maintenance. The non-contact inductive signal transmission eliminates problems associated with moisture, such as corrosion and distortion. The intrinsically safe electronics allow application in hazardous areas. Since measured values are transmitted digitally, data is free from interference and errors are immediately detected. Sensors with Memosens technology also have integrated electronics that store calibration data and operating information, allowing for calibration separately from the measuring point and protected from the effects of weather. Maintenance intervals can be defined based on all stored sensor load and calibration data.

E+H CPS97D pH Sensor Applications

  • Chemical processes
  • Water purification and wastewater
  • Pulp and paper industry
  • Contaminated media and suspended solids
  • Processes with quickly changing pH values or alternating temperatures and pressures