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.

公开(公告)号：US20230314368A1

公开(公告)日：2023-10-05

申请号：US17709754

申请日：2022-03-31

Applicant: Rosemount Inc.

Inventor： Charu L. PANDEY ,  Tyrel L. RUCH ,  Kevin J. IVANCA ,  Steven J. MCCOY

IPC: G01N27/416 ,  G01K7/16 ,  G01N27/30

CPC classification number: G01N27/4167 ,  G01K7/16 ,  G01N27/301

Abstract: A pH sensing probe configured to be exposed to a process fluid is provided. The pH sensing probe includes a sensor body and a pH electrode mounted to the sensor body. A primary reference electrode is mounted to the sensor body and has a primary reference junction that is configured to be exposed to the process fluid. A secondary reference electrode is mounted to the sensor body and has a secondary reference junction configured to be exposed to the process fluid. A seal isolates the secondary reference junction from the process fluid until deterioration of the primary reference junction. A pH sensing system and a method of operating a pH sensing system are also provided.