Impact type hardness tester
HH-401 MITUTOYO

Technical Data
Impactor: Impact hammer with integrated
detector and carbide-ball tip
(D type: conforming to ASTM A 956)
Display unit: 7-segment LCD
Display range* / Resolution
Leeb: 1-999HL / 1HL
Conversion hardness display
Vickers: 43-950HV / 1HV
Brinell: 20-894HB / 1HB
Rockwell C: 19.3-68.2HRC / 0.1HRC
Rockwell B: 13.5-101.7HRB / 0.1HRB
Shore: 13.2-99.3HS / 0.1HS
Tensile strength: 499-1996MPa / 1MPa
*Display range depends on conversion table.
Functions: Auto angle compensation, Offset,
OK/NG judgment, Hardness scale
conversion
Data storage (1800 data entries)
Statistical analysis (Average,
Maximum, Minimum, Dispersion)
Auto sleep function Impact counter
display function
Testable workpiece
Thickness: Minimum 5mm
Mass: 5kg or more
Test points: 5mm or more from the edge of the
sample, 3mm or more to each of the
tested points.
Surface roughness: Ra 2μm or better
Output: RS-232C, SPC
Power supply: Alkaline AA battery 2pcs or optional
AC adapter (battery life: 70 hours)
Size / Mass
Display unit: 70x110x35mm, 200g
Impactor: ø28x175mm, 120g