Modular Conductivity Tester based on Eddy current

I need a compact, modular eddy-current device built from the ground up to verify the purity of non-ferrous metals during material research and development. Because the unit will often be carried to mines,... (Budget: ₹100000 - ₹250000 INR, Jobs: Analog Electronics, Electrical Engineering, Electronics, Embedded Systems, Microcontroller, PCB Design and Layout, Prototyping, Signal Processing)