The sclerometer, also known as the Turner-sclerometer (from Ancient Greek: σκληρός meaning "hard"), is an instrument used by metallurgists, material scientists and mineralogists to measure the scratch hardness of materials. It was invented in 1896 by Thomas Turner (1861–1951), the first Professor of metallurgy in Britain, at the University of Birmingham.
- Hardness – Resistance to localized plastic deformation from mechanical indentation or abrasion
- Scleroscope – Instrument used to measure rebound hardness
- Tribometer – An instrument that measures tribological quantities