portable hardness tester 1.Pass ISO 9001 2.Size:230 X 90 X 46mm 3.Continuous Working time:About 100h SH-310 LEEB HARDNESS TESTER Product ModelLeeb hardness tester SH310 Technical SpecificationHardness scaleHL, HRC, HRB, HRA, HV, HB, HSMemory240-1000 groups (Impact times:32-1)Tensile strength U.T.S. range374~2652 MPaStandard Impact DeviceDOptional Impact DevicesDC, D+15, G, C, DLPowerRechargeable ...