Fremgangsmåte og apparatur for å bestemme diffuserbare hydrogenkonsentrasjoner

A measuring apparatus and method for use in measuring diffusible hydrogen concentrations in materials, structures, and other objects. For use in welding applications, the measuring apparatus (10) includes a sensor assembly (20) including a sealing member (40), which defines a sample area (17) on a weld bead (16) from which hydrogen evolves into a sample volume (18). The hydrogen reacts with a sensing layer (28) and a reflector layer (30) positioned on the end of an optical fiber (24). The sensing layer (28) comprises a chemochromic material, which undergoes property changes upon exposure to hydrogen, which are measured by the measuring apparatus (10) to determine the amount of hydrogen evolving from the sample area (17). A signal analyzer (72) is included in the hydrogen monitoring assembly (60).