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.