PORTABLE MULTI-IONS SENSING SYSTEM AND FABRICATION THEREOF

摘要

A portable multi-ions sensing system is provided. The sensing system includes: a sensing unit for sensing a pH value and a plurality of ion concentrations of a solution and outputting a sensing signal, wherein the sensing unit includes: a substrate; an ITO layer on the substrate; a sensing layer on the ITO layer and connected with an extended lead; a packaging layer encapsulating the sensing layer, the ITO layer and a portion of the substrate with a sensing window for exposing a portion of the sensing layer; a multi-ions selective layer on the portion of the sensing layer exposed by the sensing window for sensing the ion concentrations; and a reference electrode for providing a reference potential for the sensing layer; an analog signal processing unit for receiving, filtering, amplifying and adjusting the level of the sensing signal and outputting a front-end signal; a microcontroller unit for receiving and performing analog/digital converting and two-point correcting processes on the front-end signal and outputting a measurement data; and a real-time display unit for receiving and displaying the measurement data.