Portable device for microelectrode array bio-impedance measurements

Abstract

In bio-medical and environmental applications using microelectrode arrays, it is important to know the electrode- electrolyte impedance. Most impedance meters are big and heavy, and therefore not useful in some in-vivo and in-vitro experiments. In this paper we present a low cost portable device for microelectrode array bio-impedance measurements. By applying a low amplitude AC signal, the device is able to measure impedances from 500Ω to 5MΩ, scanned from 100Hz to 100kHz, on up to 112 different electrodes, with a maximum error of 5%. It consists of a reduced size, battery powered device which includes wireless communication to a PC o PDA through a Bluetooth link. © 2009 Springer-Verlag.