A contact profilometer is a precision instrument used to measure the surface profile of an object. It works by dragging a fine stylus across the surface, which records the height variations as it moves. This data is then used to create a detailed map of the surface texture, including roughness and waviness. These devices are commonly used in manufacturing and quality control to ensure that surfaces meet specific standards. They can measure various materials, including metals, plastics, and ceramics, making them versatile tools in industries such as automotive, electronics, and aerospace.