PHR series portable hardness tester used three intenders: diamond intender、φ1.588mm steel ball intender and φ3.175mm steel ball intender, adopt three testing force: 60kg、100kg、150kg, according to basic definition of Rockwell hardness test to make. And has nine scale HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRK, HRH to be chose.
