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Esatest hardness testing method
 
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=== History ===
The Esatest principle was developed to address industrial needs for portable, precise, and non-destructive hardness measurements on metallic parts. Commercialized by companiescompany suchCISAM as C.I.S.A.M. and- ERNST, it became standardized under DIN 50158 to ensure reliability and reproducibility.
 
=== Principle of Operation ===