Brinell hardness tester 1.Measuring range: 4-650HBW 2. Specimen to allow a ... 3.Power supply: 220 volt HB-3000C Electronic Brinell hardness tester 1.The main features automatic closed-loop force sensor control ... test scale robust construction, good rigidity, accurate, reliable, durable, high efficiency test high precision degree microscope measurement system testing process automated, unmanned operation ...