• Vaiseshika Electron Device

Micro Hardness Tester

Vaiseshika Electron Devices manufactures Micro Hardness Tester. It is very easy to operate and highly cost effective. The instrument uses opto-mechanical design to measure the hardness of metal surfaces. It comprises of a microscope along with a filar micrometer eyepiece of 10X and objective of 40X. The instrument is mounted on a stand having loading and unloading mechanism attached to the microscope. A standard weight of 100 gm or 200 gm is loaded on the indentor assembly. An indentation with the help of a diamond indentor is caused on the material of the surface (whose hardness is to be measured). The system employs a high precision rotating specimen table (fitted with micro meter screw gauges) to turn the sample under the microscope along X and Y-axis. The principle of operation of the instrument is based on pressing a diamond indentor (square based pyramid with an angle of 136?) into the specimen under test with a certain load in gm and consequently measuring linear value of the diagonal of the indentor print obtained.