公开(公告)号：US11860117B2

公开(公告)日：2024-01-02

申请号：US17652711

申请日：2022-02-28

申请人： Luh Cherng Enterprise Co., Ltd.

发明人： Wen-Feng Tsai ,  Ke-Fu Lin

IPC分类号： G01N27/30 ,  G01N27/403 ,  G01N27/416 ,  G01N27/36

CPC分类号： G01N27/301 ,  G01N27/36 ,  G01N27/4035 ,  G01N27/4167

摘要： A pH sensor for detecting a pH of a sample includes a reference electrode and a glass electrode. The reference electrode includes a hollow tubular housing, and at least one water absorbing unit disposed in the housing and including a porous junction member configured to contact the sample, and a water absorbing member disposed on one side of the porous junction member that is opposite to the sample. The water absorbing member is made by soaking a superabsorbent polymer in potassium chloride solution. The glass electrode is inserted into the water absorbing member, and protrudes from the junction member toward the sample.