Device for measuring the electrode potential of underwater concrete reinforcement

A device for measuring the electrode potential of the reinforcement in an underwater concrete structure, the device being of the type comprising:

• a reference electrode for placing against the concrete facing of said structure while the measurement is being performed;
• and
• a voltmeter connected firstly to said reference electrode and secondly to the reinforcement of said concrete structure;
• the device further including:
• a bell surrounding said reference electrode having a mouth delimited by a rim comprising a deformable material, said rim being placed against the facing of the concrete structure at least while the measurement is being performed such that said mouth is closed in watertight manner by said facing, and such that said bell defines with said facing a watertight enclosure in which said reference electrode is disposed to bear against said facing;
• gas injection means for injecting a gas, into said enclosure so as to expel water therefrom;
• water escape means to enable the water contained in said enclosure to escape therefrom under the action of said gas;
• and
• thrust means for pressing said reference electrode situated inside said enclosure against said facing.