Quadra Impedance Spectroscopy

Quadra platform is a patented impedance spectroscopy solution suitable for both embedding and autonomous field applications. It is a compact impedance-mapping technology that can be used for creating portable connected devices or large-scale industrial measurement systems.

Quadra enables fast, real-time detection of changes in any object with electrical properties. The solution has existing applications in biomedicine and diagnostics, food technology as well as industrial process control.

Quadra platform

generates a binary waveform with real-time calculation of impedance. It is possible to select different sets of 15 spectrogram frequencies. The highest set, 1 kHz…349 kHz is suitable for applications from tissue and material structure mapping to detection of cells and coatings. The lowest set, 0.5 Hz … 195 Hz extends down to frequencies used for electrochemical applications.

Each application requires a specific front end and a specific type and arrangement of electrodes for excitation and response measurement with the object. Data processing in the host system enables visualisation, extracting information, modelling and classification.



  • Simultaneous 15-frequency measurement for detecting subtle changes
  • Real-time 1000 measurements per second sampling rate enables to monitor rapid changes
  • Compact size suitable for embedding in OEM devices
  • Patented technology based on 40 years of experience in impedance measurement
  • Software enables simple customisation for any application

Technical specs

  • Spectrogram Acquisition Period: 1 ms
  • Number of Frequencies: 15
  • Excitation waveform: novel spectrally sparse signal
  • Power USB bus: 500mA (2.5VA), or internal battery (8h autonomous operation)
  • Module dimensions: 110 x 60 x 20 mm

Quadra Evaluation Kit

Quadra Evaluation Kit is a powerful real time impedance spectroscopy solution. The kit includes two front-ends for experimenting and provisional set-up. Quadra also includes a stand-alone utility for rapid setup with data recording and visualisation and a LabView program.


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