HR-150A is a popularly used hardness testing instrument to measure the Rockwell hardness of the materials. No need for a power supply, the speed of the test force loading is regulated by the buffer, and the test force is regulated by the load-change hand wheel. It has easy operation and stable performance, therefore it is widely used.
HR-150DT adopts the mechanism of automatic loading and unloading of the test force, the test force is regulated by the load-change hand wheel. It can select the dwell time and is very easy to use. Besides setting zero to dial, there is no man-made error. The instrument has high sensitivity and stability.