​E+H pH Electrodes: Types and Selection Guide​

​1.   Common E+H pH Electrode Models​​

E+H (Endress+Hauser) offers a range of pH electrodes tailored to diverse industrial and laboratory applications. Key models include:

2.   How to Select the Right E+H pH Electrode​​

​​Step 1:   Define Application Requirements​​

• ​​  Environment​​:
  •   Temperature/pressure range (e.g., CPS41 for >100°C/16 bar).
  •   Chemical exposure (e.g., CPS21 for aggressive media).
•   ​​Media Type​​:
  •   Low conductivity (CPS51) vs. high viscosity (CPS31 with hygienic design).
  •   Sanitary requirements (e.g., FDA compliance for food processing).

​​Step 2:   Match Electrode Features​​

• ​​  Sensor Material​​:
  •   Glass (standard) vs. ceramic (CPS21 for extreme corrosion).
• ​​  Reference System​​:
  •   Gel-filled (low maintenance) vs. liquid-filled (fast response).
  •   Double junction (CPS51/CPS71) for contaminated samples.
• ​  ​Output Type​​:
  •   Analog (CPS11/16) vs. digital Memosens (CPS61/71 for predictive maintenance).

​​Step 3:   Compatibility Check​​

•   Ensure the electrode matches your transmitter/controller (e.g., Memosens requires compatible digital interfaces).
•   Verify mounting type (e.g., immersion, flow-through, or retractable assembly).

​​Step 4:   Maintenance & Cost​​

•   Choose replaceable electrodes (e.g., CPS71 with exchangeable reference) for cost-sensitive operations.
•   Prioritize Memosens models if reduced calibration downtime is critical.