A piezoelectric debris sensor and associated signal processor responsive to debris strikes enable an autonomous or non-autonomous cleaning device to detect the presence of debris and in response, to select a behavioral mode, operational condition or pattern of movement, such as spot coverage or the like. The vessel assembly has a liquid space and a vapor space. A hand crankable crank shaft arrangement have a center and first and second ends and having handle segments. The pad-rearrangement pattern includes a bond pad disposed over at least a part of the cell region.