Beijing Technology and Business University 1 article published in JoVE Engineering Production of a Strain-Measuring Device with an Improved 3D Printer Qiuyue Du1, Weichao Wu1, Huiyu Xiang1 1Department of Materials Science and Mechanical Engineering, Beijing Technology and Business University This work presents a strain measurement sensor consisting of an amplification mechanism and a polydimethylsiloxane microscope manufactured using an improved 3D printer.