Sensing device and electrode test piece of the sensing device

Abstract

A sensing device and an electrode test piece of the sensing device are disclosed. The sensing device includes the electrode test piece, a reference electrode, an assistant electrode and a control unit. The electrode test piece includes a substrate, a first working electrode, a second working electrode and an insulating layer. The first working electrode includes a first route part and a first output pad. The second working electrode includes a second route part, a third route part and a second output pad. A gap is between the second and third route parts. The insulating layer covers the first route part, the second route part and the third route part. The insulating layer defines an opening so that the insulating layer does not cover a part of the gap or the first route part corresponding to the part of the gap. The control unit detects a first signal value of the first working electrode and a second signal value of the second working electrode and outputs a sensing value according to the difference of the first signal value and the second signal value.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a sensing device applying the electrochemical principle and an electrode test piece of the sensing device. Background technique [0002] The sensing method of the electrochemical three-electrode electrolyzer is to detect the change of chemical energy and convert it into an electrical signal for subsequent various analysis, such as reaction rate analysis, concentration analysis, corrosion rate analysis and so on. With the development of printed circuits, electrodes can be printed on the substrate by printing technology to form electrode test strips. Since the printed electrodes on the test strips are very small, it can measure a small amount of samples, low chemical change, and low current. for sensing. Furthermore, by adding reaction materials such as catalysts or enzymes, the electrode test strip can be used for biomedical applications such as sensing blood sugar, cholesterol, n...

AI Technical Summary

Problems solved by technology

The current printing technology of the insulating layer may cause displacement or skew deviation, which will cause the area of ​​the working electrode exposed to the sample or electrolytic solution to be inconsistent for each electrode test piece.

This problem will cause the signal value sensed by each electrode test piece under the same condition, for example, the current amount or current density will be different, which will affect the final output sensed value

Due to the deviation and instability of the printing process, the sensing accuracy and stability of the electrode test piece, as well as the output sensing value are questioned

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