The claimed ornamental design is shown embodied on an assembly that may be used, for example, as a multi-dimensional distance measuring device (e.g., two-dimensional, three-dimensional, four-dimensional), which may be implemented, by way of example and not limitation, to monitor fill level in one or more volumes of interest. In an illustrative example, the claimed ornamental design may be implemented on device operating as a photoelectric sensor. The broken lines shown in the drawings illustrate unclaimed portions of the claimed design and form no part of the claimed design. Where no boundary line is shown between solid lines, this disclosure encompasses at least a corresponding embodiment in which a boundary line connects the ends of solid lines to demarcate a boundary between a claimed portion and an unclaimed portion.