What are the unique features of a microhardness tester compared to other hardness testing methods?

The obvious advantage of the microhardness tester is that its hardness value is independent of the magnitude of the test force; as long as the material hardness is uniform, the test force can be chosen arbitrarily, and the hardness value will remain constant. This provides users with a unified scale across a wide range of hardness, making testing more convenient and accurate.
In addition, for materials with medium to low hardness values, the test results of the microhardness tester are almost identical to those of the Brinell hardness tester, but when testing hardness less than 400HV, the microhardness tester can even provide test results that are closer to the true value.