In this study, a dual mode glucose biosensor based on the amperometric and potentiometric techniques is proposed. The amperometric and potentiometric circuit modes are linked in one system by a 9-pin switch to construct a dual mode circuit. Moreover, the homemade dual mode circuit is designed for detecting amperometric and potentiometric signals to realize the small dimension and low cost advantages for portable and home-care purposes. According to the experiment results, the merit for the tin oxide (SnO2) amperometric glucose biosensor is rapid detection. Conversely, the SnO2 potentiometric glucose biosensor can be operated under a simple circuit. Accordingly, these two different biosensors combined in one system provide users a versatile option.
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