This part is a kind of semiconductor called MH180.

Function of this product has Leeb Hardness Tester User Manual.

Manufacturers : Mitech

Image and pinout :

Some of the text within the PDF file :

MH180 Leeb Hardness Tester User’s Manual Mitech Inc. Ltd. MITECH www.mitech-ndt.com 1 Overview .3 1.1 Advantages.3 1.2 Main Application &Testing Range 3 1.2.1 Main Application 3 1.2.2 Testing Range... [ ... ]

MH180 PDF Datasheet Download