In this research, to meet the growing need of wearable electronic devices, a low cost and low energy consumption gas sensor array chip combined with printed electrodes and flexible substrate is developed. Eight different layouts are designed and the relation between sensitivity and electrode gap is discovered through the testing responses to different concentrations of ethanol and methane.

The flexible gas sensor integrated to wearable device can monitor those harmful volatile organic compounds and explosive gases real-time in our daily life and be part of the Internet of Things (IoT) . To achieve the ideal using condition and lower the price, resistive gas sensor array using polymer and carbon black mixture as sensing material may be the best choice due to the advantages of low cost, easy coating and room temperature operation.