DEVICE FOR MEASURING THE CONCENTRATION OF SULPHIDE IONS IN A FLUID FROM A WELL, AND ASSOCIATED EQUIPMENT

摘要

The invention relates to a device that includes a measuring probe (51) to be dipped into the fluid, wherein the measuring probe (51) includes at least one reference electrode (59A), a pH measurement electrode (59B), and an electrode (59C) for measuring sulphide ions. Each electrode (59A-59C) includes a housing sealed by an active measuring wall, a metal wire provided in the housing, and an inner reference arranged in the housing in contact with the active wall and the metal wire. The device (19) includes an apparatus (93) for measuring the voltage at the terminals of each electrode pair, which is electrically connected to each metal wire. The inner reference of at least the electrode (59C) for measuring sulphide ions is formed exclusively of a solid.