1.Computer control 2.Also can measuring Knoop hardness 3.High precision UseageIt mianly can be used to test factory quality inspection departments and schools materials, testing and teaching, and so the ideal hardness testing equipment.Specifications Microhardness scaleHV1,HV2,HV3,HV5,HV10,HV20,HV30,HV50Test force(N)9.8,19.6,29.4,49,98,196,294,490Dwell time5-99sObjective10×,20× Eyepiece ...