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Sauter HN D Leeb Hardness Meter Sauter HN D P When a hardness test is carried out by the Sauter HN D Leeb hardness meter an impact body with a tungsten carbide test tip is propelled by spring force against the surface to be tested from which it rebounds P P Impact and rebound velocities are measured by the following method a permanent magnet integrated into the impact body passes through a coil and induces an electric voltage during its travels back and forth The voltages are proporti
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