Modular Eddy Current Purity Tester -- 2
Budget: ₹100,000 – ₹250,000 INR
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, scrapyards, and temporary field labs, I’m prioritising a rugged, weather-resistant enclosure, battery operation for a full working day, and quick-swap probes so I can tailor frequency and coil geometry to different sample shapes.
Core expectations
• A handheld main unit that houses the signal generator, receiver, display, data-logging memory and rechargeable power pack.
• Interchangeable probe modules covering the typical kilohertz-to-megahertz range used for non-ferrous purity checks, each probe auto-calibrating on connection.
• On-board firmware that shows impedance plane plots and numeric purity indices in real time, with simple zero, lift-off and reference calibration routines.
• A desktop companion app (Windows or cross-platform) for deeper analysis and CSV export via USB-C or Bluetooth LE.
• Complete build package: schematics, PCB files, firmware source, 3D CAD for the housing, and a short user guide so my lab team can reproduce and service the unit.
Acceptance criteria
1. The prototype must detect at least a 2 % change in conductivity between known aluminium reference standards in an outdoor environment.
2. Logged data must match readings displayed on the handset (±1 % deviation) when imported into the desktop app.
3. All documentation supplied in editable formats.
Familiarity with eddy-current instrumentation, analogue front-end design, microcontrollers (e.g. STM32, ESP32), and enclosure prototyping will be key to delivering a field-ready tester that I can take straight into use.
Core expectations
• A handheld main unit that houses the signal generator, receiver, display, data-logging memory and rechargeable power pack.
• Interchangeable probe modules covering the typical kilohertz-to-megahertz range used for non-ferrous purity checks, each probe auto-calibrating on connection.
• On-board firmware that shows impedance plane plots and numeric purity indices in real time, with simple zero, lift-off and reference calibration routines.
• A desktop companion app (Windows or cross-platform) for deeper analysis and CSV export via USB-C or Bluetooth LE.
• Complete build package: schematics, PCB files, firmware source, 3D CAD for the housing, and a short user guide so my lab team can reproduce and service the unit.
Acceptance criteria
1. The prototype must detect at least a 2 % change in conductivity between known aluminium reference standards in an outdoor environment.
2. Logged data must match readings displayed on the handset (±1 % deviation) when imported into the desktop app.
3. All documentation supplied in editable formats.
Familiarity with eddy-current instrumentation, analogue front-end design, microcontrollers (e.g. STM32, ESP32), and enclosure prototyping will be key to delivering a field-ready tester that I can take straight into use.