Ultra low power temperature compensation method for palladium nanowire grid

An interface was designed to independently measure two palladium nanowires on one substrate to decrease the cross sensitivity for temperature. The circuit was evaluated in a test chamber where temperature, humidity and hydrogen concentration could be controlled. The palladium sensors showed no response to humidity s as high as 80%, but did show an expected response to temperature.One of the nanowires was covered with a 2-Hydroxyethyl methacrylate based compound to prevent hydrogen from reaching the wire. The compound was dried by a UV source and tested in chamber for comparison with previous measurements. The results shows that temperature effects can be reduced by a digital signal processing algorithm without measuring temperature near or at the substrate. With this method no additional temperature probes are necessary making this solution a candidate for ultra low power wireless applications.