An electronic device can include an electrode and an organic active region. In one embodiment, the modular recessed dispensers include replaceable doors or front panels and adjustable shelves and dividers that may be quickly reconfigured to cooperate with the replaced door. A stick-receiving aperture receives the stick to support the ice cream above the catchment surface and a drain enables any drips caught by the catchment surface to migrate into the cavity. The light from the scanning source is split to two portions: reference path to reference detector with no fluid in the transmission, and sample path to sample detector with fluid in the transmission. The surface is limited transversely to the longitudinal direction by sidewalls in whose region an absorption zone is formed.