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The latest developments in Zwick's ZHU/zwicki-Line provide a unique, innovative system for classical and instrumented hardness testing. This fully automatic universal hardness testing system covers the Vickers, Knoop, Brinell, Rockwell, ball indentation and instrumented indentation methods.

The ZHU/zwicki-Line for instrumented indentation testing in the macro range covers a wide range of applications and features hardware and electronics precisely tailored to the requirements of hardness testing, guaranteeing high reproducibility. In addition to instrumented indentation tests to determine hardness and other material parameters, the ZHU/zwickiLine can perform all the classical hardness testing methods used for metals.

Whichever method is used, the testing system records the load-indentation depth curve to provide additional material assessment. The instrumented indentation test includes elastic and plastic deformations in order to obtain the elastic and plastic material characteristic values.

The core of the testing system is a hardness measuring head, into which the measuring systems for test load and indentation depth plus an indentor with hold-down device are integrated. For optically based hardness testing methods to Vickers, Knoop and Brinell an add-on unit with measuring microscope is available. This unit is motorized in accordance with the trend to increasing automation and reduction of operator influence, while indentation setting, microscope positioning and optical measurement of the indentation are all performed completely automatically.