Wireless Sensing System for Flexible Arrayed Potentiometric Sensor Based on XBee Module

In this paper, the wireless sensor network (WSN) with the ZigBee standard is integrated with the flexible arrayed potentiometric sensor, such as flexible arrayed pH sensor and flexible arrayed glucose biosensor that achieve a wireless sensing system. The wireless sensing system is accomplished by the graphical language laboratory virtual instrumentation engineering workbench and the detection signals are displayed in real time in the computer. A potentiometric electrochemical method is used to measure the output signal of potential difference between the silver/silver chloride (Ag/AgCl) reference electrode and the flexible arrayed potentiometric sensor. We provide a wireless sensing system of XBee module, which has the advantages of low cost, easy operation, portable device, high accuracy, real-time monitoring, and rapid detection. According to the experimental results of flexible arrayed pH sensor and flexible arrayed glucose biosensor, the range of pH values from pH 1 to pH 13 has a good average sensitivity of 51.38 mV/pH and a linearity of 0.995, and the range of glucose solution concentration from 100 to 500 mg/dL has a good average sensitivity of 0.179 mV(mg/dL)-1and a linearity of 0.999. The actual target in this paper is to provide a wireless sensing system for ion sensing and monitoring of human physiological data.