Everything you need to experiment with bioimpedance spectroscopy and electrical impedance tomography (EIT). Spectra is a highly precise impedance measurement device, with temperature calibrated impedance measurements. The kit includes the pre-tested main PCB with firmware already loaded, a small 'phantom' tank with 32 electrode flexible electrode array, an electrode expansion adapter to easily connect your own electrodes, USB power and data cable, and a 4-channel gold-plated electrode cable for bioimpedance spectroscopy and time series impedance measurements.
To find out more see our software installation and device tutorials: openeit.github.io
Features & Specifications
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Precise and highly configurable sensor hardware
- Can be configured to use 8, 16 or 32 electrodes via the dashboard.
- Sample rate: 160,000 sps.
- Each impedance measure is made using differential referencing at 16-bit resolution.
- Does temperature and onboard resistance calibration to ensure impedance measurement accuracy over the load.
- In-built firmware modes: 1. time series impedance, 2. bioimpedance spectroscopy, 3. 8 electrode EIT, 4. 16 electrode EIT, 5. 32 electrode EIT.
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Built for safety and ease-of-use
- DC power removal filters meet IEC60601-1 safety specifications.
- Compatible with a 3.5 V, 850 mAh battery (not included) for improved portability. On-board circuitry allows charging via the supplied USB cable.
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Flexible open source software
- Easy to install software supports time series impedance measurements, bio-impedance spectroscopy, and electrical impedance tomography, between 80 Hz and 80 kHz, with up to 32 electrodes.
- Supports three different types of real-time tomographic reconstruction: Graz Consensus, Gauss-Newton Method, and Back Projection. You can record for analysis offline or run in real-time.
- Hardware includes Serial Wire Debug (SWD) programmers for firmware re-programming.
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Portable design
- Tiny, portable PCB measures approximately 2” by 2” and comes with a custom plastic enclosure. Sit it on your desk while trying algorithm improvements.
- Comes with a small, cylindrical tank phantom (140 mm diameter, 60 mm height).
Can I modify the software to suit my application?
Yes! See https://github.com/openeit
This is an open source software project and we welcome community contributions, feedback and collaboration! Check out the forum in the community hub!
Disclaimer
Be gentle with your Spectra! Avoid spilling liquids on the enclosure that contains the electronics as it was not designed to be waterproof. All usage is at the buyers own risk. Finally, this is a research device and is not intended for medical diagnosis.