Electrochemical corrosion potential sensor

An electrochemical corrosion potential sensor comprising:

• a conductive electrode fixing body;
• an electrode cap member made of zirconium and fixed to the electrode fixing body;
• a tubular insulator connected to the electrode fixing body;
• a tubular metallic housing connected to the tubular insulator;
• and
• a conductive wire passing through the tubular insulator and the tubular metallic housing and connected to the electrode fixing body;
• wherein in a first connecting portion of the electrode fixing body and one end portion of the tubular insulator, the electrode fixing body is disposed outside of the tubular insulator and overlapped to the tubular insulator;
• wherein in a second connecting portion of another end portion of the tubular insulator and the tubular metallic housing, the tubular metallic housing is disposed outside of the tubular insulator and overlapped to the tubular insulator;
• wherein the electrode cap member is disposed to cover an outer surface of the electrode fixing body;
• wherein the electrode cap member is disposed to cover the outer surface of the electrode fixing body and an outer surface of the first connecting portion;
• and
• wherein a metallic spacer made of zirconium is disposed in a clearance between the electrode cap member and the tubular insulator.