| abstract |
A sensor for hydrogen in a fluid medium comprises a housing 10 with a chamber 28 for ionic liquid electrolyte with a window 20 which is selectively permeable to hydrogen to allow hydrogen to pass from the fluid medium under test into the electrolyte in the chamber. A plurality of electrodes 14, 16, 18 in contact with the ionic liquid electrolyte are used to observe hydrogen concentration by voltammetry. Applications where such a sensor may be used include a wellbore tool for measuring the content of hydrogen in a subterranean fluid, monitoring of fiber-optic cables for damage by hydrogen, corrosion monitoring, and small-scale process plant where hydrogen is part of a gas stream. |