... : HL, HB, HRB, HRC, HRA, HV,HS portable hardness tester Features: Based on HL hardness measuring principle, can detect various ... environment. The largest store reach 100 groups (impact times 32 ~ 1), hardness measurements, each measurement data includes single value, average value ... HV,HS Data Storage: Maximum 500 group (impact times:32 ~ 1) Thermal printer, working quietly, can be printed any number of ...