... HRB, HRC,HRA,HV,HS; 3, Direct Thermal Hardness tester LK110AFeatures: Based on HL hardness measuring principle, can detect ... groups (impact times 32 ~ 1), hardness measurements, each measurement data includes single value, average value, measurement date, impact direction, ... can quickly and easily exchange with the PC machine data. Can be equipped with computer software, with transmission measure ...