Wireless sensor networks being a collection of numerous sensor nodes, each with sensing (temperature, humidity, sound level, light intensity, magnetism, etc.) and wireless communication capabilities, provide huge opportunities for monitoring and mathematical modeling of the time-evolution of the physical quantities under investigation. Starting from the measurements collected by the sensor node...

A Love wave humidity sensor is developed by using a multilayer structure consisting of PVA/SiO2 layers on an ST-90°X quartz substrate. The theoretical result shows that the sensor with such a two-layer structure can achieve a higher sensitivity and a smaller loss than the structures with a single polymer layer. Comparative experiments are performed for the sensor incorporating PVA/SiO2 layers a...

In this paper, we investigated the effect of humidity on paper substrates and propose a simple and low-cost method for their passivation using ZnO nanoparticles. To this end, we built paper-based microdevices based on an interdigitated electrode (IDE) configuration by means of a mask-less laser patterning method on simple commercial printing papers. Initial resistive measurements indicate that ...

This study is an investigation of high-humidity aging effects on the total volatile organic compound (T-VOC) gas-sensing properties of platinum, palladium, and gold-loaded tin oxide (Pt,Pd,Au/SnO(2)) thick films. The sensor responses of the high-humidity aged Pt,Pd,Au/SnO(2), a non-aged Pt,Pd,Au/SnO(2), and a high-humidity aged Pt/SnO(2) to T-VOC test gas have been measured. The high-humidity a...

This is not correct. While the RS92 RH sensor does respond much faster than RS80, time-lag error can still be substantial when T < -45C. The sensor time-constant at 45C is about 15 s, and at -70C it is 105 s. At a 5 m/s ascent rate this corresponds to a 63% sensor response on vertical scales of 75 m and 525 m respectively, which is the scale over which humidity features are "smoothed" by slow s...