DH100 Pen Style Hardness Tester is a unique and advanced palm size hardness testing instrument, which collects the characters of small size, lightweight, attractive appearance,easy-operation,integrated design,colorful & high resolution display,low operation temperature and high accuracy, etc. It can be performance in a narrow space, in which other hardness testers feel difficult to measure.It is applicable to big specimen on-site hardness testing and batch testing on the specimen in production lines. Moreover, it is also used in metal manufacturing industry, transportation, power station, petrochemical industry, aircraft industry,construction and lab,etc.


Working Principle:
When the impact body,with a certain weight,impacts against the specimen surface under the action of spring force,Leeb hardness comes from the ratio of the impacting velocity(VA) and the rebounding velocity(VB) of the impact body by the moment the spherical testing tip is located at 1mm point from specimen surface.
With principle of electromagnetism，the permanent magnet in the coil of impact device produced an induced voltage, which is in proportion to the impact body velocity.

The leeb hardness values are calculated by the following formula:

HL=1000X(Vb/Va)




Using Scopes:
Die cavity of molds
Bearings and other parts
Failure analysis of pressure vessel, steam generator and other equipment
Heavy work piece
The installed machinery and permanently assembled parts
Testing surface of a small hollow space
Material identification in the warehouse of metallic materials
Rapid testing in large range and multi-measuring areas for large-scale work piece