Self-heated hydrogen gas sensors based on Pt-coated W18O49 nanowire networks with high sensitivity, good selectivity and low power consumption

Effects of gamma irradiation on hydrogen gas-sensing characteristics of Pd–SnO2 thin film sensors

“…Thus, the adsorption and desorption of H 2 on the surface of SnO 2 still occurred reversibly. Our sensor showed faster response time compared to that of other materials such as PdeSnO 2 nanowires, ZnO nanorods, and PteZnO nanorods [31]. This achievement is very important because fast response time is required in hydrogen safety application.…”

Improved performance of fiber optic hydrogen sensor based on WO3-Pd2Pt-Pt composite film and self-referenced demodulation method

“…One reason for the good anti-humidity interference is the heating effect of the ASE light source, so the water molecular can be removed from the surface of the hydrogen sensitive film [39]. Hydrogen molecular can easily penetrate into WO 3 -Pd 2 Pt-Pt composite film, and the chemical reaction can mantian equilibrium by self-heating effect [40,41] of hydrogen sensitive film. Therefore, the performance of WO 3 -Pd 2 Pt-Pt composite film is hardly affected by ambient humidity.…”

Temperature Compensation Methods of Nondispersive Infrared CO2 Gas Sensor with Dual Ellipsoidal Optical Waveguide

“…(3)(4)(5) Because the principles of the abovementioned sensors are mainly based on the chemical reactions between the target gas and the surface of the sensor, they are heated to activate the surfaces of the sensors to improve the sensitivity of the sensor itself. However, devices working on this principle show poor selectivity amongst other ambient gases (mainly water vapor, hydrocarbons, and carbon monoxide) because the surfaces are exposed directly to the ambient environment, (6,7) whereas nondispersive infrared (NDIR) sensors are considered to be specific to those species alone. (8) Although there are some technical methods for improving the selectivity of nonoptical sensors, it is cumbersome to discriminate the target gas from other ambient gases in practical applications.…”