公开(公告)号：US20230314360A1

公开(公告)日：2023-10-05

申请号：US17710038

申请日：2022-03-31

Applicant: Rosemount Inc.

Inventor： Charu L. PANDEY ,  Kevin J. IVANCA ,  Jeff B. AMBROSE

IPC: G01N27/30 ,  G01N27/36 ,  G01N27/416

CPC classification number: G01N27/302 ,  G01N27/36 ,  G01N27/4165

Abstract: A pH sensing that is configured to be exposed to a process fluid is provided. The pH sensing probe includes a sensor body and a pH glass electrode mounted to the sensor body. A reference electrode has a junction mounted to the sensor body that is configured to be exposed to the process fluid. A backup pH electrode is mounted to the sensor body and configured to be exposed to the process fluid. A pH sensing system and a method of operating a pH sensing system are also provided. In one example, the backup pH electrode is an ISFET electrode that can be automatically switched to when the pH glass electrode is compromised.