Modular Eddy Current Purity Tester

₹400-750 INR / hour

Open

Posted 7 days ago

•

Ends in 7 hours

₹400-750 INR / hour

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.

Embedded Systems

PCB Design and Layout

Analog Electronics

Electronics

Microcontroller

Electrical Engineering

Signal Processing

Prototyping

Project ID: 40468390

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3 proposals

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3 freelancers are bidding on average ₹1,217 INR/hour for this job

@Ryan15222

With my multidisciplinary background, I am uniquely capable of delivering a holistic solution to your project. My familiarity with eddy-current instrumentation, analogue front-end design, microcontrollers and enclosure prototyping is exactly what this project calls for. I have prior experience integrating mechanical design, electronics and software development to create real-world engineering solutions from scratch, mirroring the requirements of your project perfectly. Throughout my career, I have not only designed but also built and deployed projects in a way that is precise and replicable, which is a skill set that will come in handy while delivering the complete build package you require. Be it schematics, PCB files, firmware source or the 3D CAD files for the housing, you can trust me to deliver editable formats of topnotch quality. Moreover, my ability to bridge mechanical, electrical and software components during the design process leads to more robust end-products. As this eddy-current tester needs to be field-ready and have several distinct component parts working seamlessly together - such as battery operation for full working days- this difference is essential. Choose me for a reliability-intensive project such as this one and get a world-class result!

₹2,500 INR in 40 days

5.0

(2 reviews)

1.1

@uzairelectronics

I have hands-on experience designing eddy-current inspection systems, including analog front-end circuits, lock-in amplifier stages, and impedance plane visualization — exactly what your purity tester demands. I work confidently with STM32 and ESP32 microcontrollers for real-time signal processing, and I have delivered field-ready embedded firmware with calibration routines, data logging, and BLE communication. My PCB design background covers mixed-signal layouts with proper shielding and grounding, critical for sensitive eddy-current receivers operating in noisy outdoor environments. I have also prototyped ruggedized enclosures with IP-rated sealing and modular connector systems, so quick-swap probe interfaces and battery management are well within my scope. For the companion app, I can deliver a clean cross-platform tool with impedance plot visualization and CSV export over USB-C or Bluetooth LE. I will provide complete, editable deliverables — schematics, PCB files, firmware source, 3D CAD, and a user guide — so your team can reproduce and service every unit independently. I would love to discuss your timeline and any specific probe geometries or frequency bands you need covered first. Best regards, Engr. Muhammad Uzair

₹575 INR in 40 days

5.0

(2 reviews)

1.0

@TripleRrr

Proposal: Handheld Modular Non-Ferrous Eddy-Current Purity Analyzer I will design and build your compact, field-ready purity analyzer tailored for material R&D in rugged environments. Technical Architecture Main Unit: Built on an STM32 processor with an integrated TFT LCD to display real-time impedance plane plots (Z = R + j\omega L) and a numeric purity index. It features an AD9833 DDS for 1 kHz–10 MHz multi-frequency sweeps , an AD8302 for phase/amplitude detection , and a 24-bit ADS1256 ADC to capture minute deviations. Probes: Auto-calibrating, hot-swappable modules using Differential Planar Coils. This dual-coil design isolates sample irregularities and cancels out ambient outdoor noise and temperature drift. Power & Storage: Li-ion battery pack for 8+ hours of operation. Field data logs to an SD card in CSV format. Software & Deliverables Companion App: Cross-platform desktop app (USB-C/BLE data import) mapping signature curves (Frequency vs. Phase/Amplitude/Q) with CSV export. 100% Editable Package: Schematics & Gerber files, STM32 firmware source code, 3D CAD files for the rugged housing, and a concise user/service guide. Acceptance Criteria The unit will strictly meet your requirements: detecting <= 2% conductivity variance in outdoor aluminium standards and maintaining <=1% data deviation between the handset and desktop app. Ready to begin immediately. Let’s discuss your preferred physical probe connectors!

₹575 INR in 40 days