Cheap Quartz Crystal Microbalance humidity sensors based on Nafion® as sensing component

摘要

Nafion® is well known copolimer from DuPont that is used as a material for membrane in fuelcells. It is also known as sensing component in different gas and humidity sensors. This copolimer was used to humidity sensor fabrication. Proposed sensor is build as thin layer of Nafion® copolimer dipped on quartz resonator making mikrobalance scale. In this work we present a sensor responses in change of its resonance frequency due to the humidity change from 20% to 80% of RH. The sensor frequency is measured in microprocessor controlled environment to maintain faster response of the sensor. Sensed gas temperature must be mesured to compensate temperature drift.