A new product is described characterized by its qualities to absorb undesirable scents present in the air, while serving at the same time as a carrier for aromas, fragrances, flavorings, repellents, attractants and other active ingredients. The elements belong to an XML schema \u201csubstitution group\u201d to enable the POV types to be substituted for one another. The light shield member includes a light absorption member to absorb light and to generate heat, a thermal diffusion member to diffuse and radiate the heat, and a base supporting the light absorption member and thermal diffusion member. The rotary member is rotatable about the axis inside the housing, and is formed with contacting regions that are arranged along the axis and that are in sliding contact with the distal contact parts. Concentration and components of a solute existing in a non-aqueous electrolyte can be measured while an electrowinning process and pyroprocessing is being conducted.