Multiple Gas Sensing Platform With RFID Connectivity

The paper presents a multiple gas sensing platform using different gas sensors built on RFID technology. The RFID sensor consists of an electrochemical cell for sensing a gas component, an integrated potentiostat circuit, an energy harvesting and communication circuit, a voltage monitor and a coordinating microcontroller. The paper presents a single cell type and a multiple cell type RFID sensors that can be used with the sensing platform. The sensors were implemented using the integrated LMP91000 potentiostat and the Medusa-M2233 RFID tag which includes the low power MSPG2233IPW20 microcontroller. An application to control the sensing platform consisting of RFID sensors, RFID reader and a PC was developed and tested using the gas cells O2-A2 and CO-CF for sensing oxygen and carbon monoxide respectively.