... hardness tester 1.Hardness Scale:HL,HB,HRB,HRC,HRA,HV,HS 2.Display:segment LCD MH180 portable metal hardness testerTechnical Specifications ... )HS,(59-85)HRA,(13-100)HRBMeasuring direction:360°Hardness Scale:HL,HB,HRB,HRC,HRA,HV,HSDisplay:segment LCDData memory ... :about 100 hours(With backlight off)Communication interface:RS232 MH180 portable metal hardness tester