This dataset supports a study on 3D-printed flow sensors for use with hydrofluoric acid (HF) electrolytes. It includes data files, STL files corresponding to the 3D-printed components of the flow sensor, as well as high-resolution optical images documenting the chemical compatibility of MSLA-printed photopolymerized resin cubes with HF. Images were acquired using a smartphone camera and originally stored as high-resolution JPEG files. For archival purposes, images were cropped to remove empty background regions and saved in TIFF format. No contrast enhancement, filtering, or other image processing was applied.