P06 - A Portable Platform for Low Power Electrochemical Impedance Measurements of Biosensors
- Event
- 22. GMA/ITG-Fachtagung Sensoren und Messsysteme 2024
2024-06-11 - 2024-06-12
Nürnberg - Band
- Poster
- Chapter
- Poster
- Author(s)
- E. Korek, M. Lang, T. Döttling, M. Schulz, R. Brederlow - Technische Universität München,München
- Pages
- 426 - 429
- DOI
- 10.5162/sensoren2024/P06
- ISBN
- 978-3-910600-01-0
- Price
- free
Abstract
Electrochemical impedance spectroscopy is a measurement method that is currently gaining a lot of interest, e.g. as a low-power readout method for miniaturized biosensors. Many biosensor applications require miniaturization and portability of the sensor and the readout platform. For this reason, we present a low-power readout board (ø 40 mm) for impedimetric biosensors that covers high dynamic ranges of 500 Ω to 130 MΩ and can measure over frequencies ranging from 100mHz to 10kHz. The board is powered by a 610mAh Li-Ion coin cell, and the required sensor signal amplification is determined automatically in the software. We measured two dummy sensors covering the whole impedance range and compared the results to a laboratory potentiostat. The board shows a very high measurement accuracy of <0.5% for magnitude and phase of the impedance, high precision, and a battery lifetime of six months and can, therefore, enable many new portable applications.