A system and a method for gas sensing while correcting for an interferent condition around a gas sensor. The gas sensor provides dielectric excitation of a gas sensing element and an interferent-compensating sensing element arranged as a single electrical circuit at a set of frequencies, measures impedance responses of the gas sensing element and the interferent-compensating sensing element to the dielectric excitation at the set of frequencies, determines, based on the impedance responses of the gas sensing element and the interferent-compensating sensing element to the dielectric excitation the identities, the respective concentrations, or a combination thereof, of at least one analyte gas of the monitored environment, corrected for one or more sensed interferent conditions of the ambient environment.

The present disclosure relates to a sensing system and method that includes a plurality of resistive elements coupled to a plurality of nodes and a control system configured to index through a plurality of modes to measure an electrical characteristic for each resistive element. Each mode of the plurality of modes represents a different combination of power, return, or open circuit condition applied to each of the plurality of nodes, and the control system is configured to calculate, for each of the modes, a total power consumed by the system and a power consumed by each of the resistive elements based on the measured electrical characteristics, to determine a physical parameter.

A resistance-integrated gas sensor is provided, including a substrate, a first metal oxide layer, an insulating layer, a contact metal layer, a contact hole, a second metal oxide layer, and an interdigitated electrode layer. The first metal oxide layer is disposed in the substrate. The insulating layer is disposed on the substrate and the first metal oxide layer. The contact metal layer and the contact hole are disposed in the insulating layer. The second metal oxide layer is disposed on the insulating layer. A portion of the interdigitated electrode layer is disposed on the insulating layer, and another portion is disposed in the second metal oxide layer. The contact metal layer and the contact hole connect the first metal oxide layer and the interdigitated electrode layer.

A method for measuring hydrogen concentration in a gas includes exposing a PdNi alloy thin-film gas sensor to the gas, alternately controlling the temperature of the PdNi alloy thin-film gas sensor between a first temperature for a first period of time and a second temperature for a second period of time while the PdNi alloy thin-film sensor is exposed to the gas, continuously monitoring the resistance of the PdNi alloy thin-film gas sensor during the first and second periods of time, and calculating the hydrogen concentration as a function of a transient in the resistance of the PdNi alloy thin-film sensor measured at a time that the temperature transitions between the first temperature and the second temperature.

A gas sensor device with temperature uniformity is presented herein. In an implementation, a device includes a complementary metal-oxide semiconductor (CMOS) substrate layer, a dielectric layer and a gas sensing layer. The dielectric layer is deposited on the CMOS substrate layer. Furthermore, the dielectric layer includes a temperature sensor and a heating element coupled to a heat transfer layer associated with a set of metal interconnections. The gas sensing layer is deposited on the dielectric layer.

A microcontroller based digital back end for controlling an analog front end, to optimize power delivery, measurement, and data collection of an array of nanomaterial-based gas sensors to supply data to an integrated pattern recognition algorithm.

A method is described for identifying and quantifying single and mixed contaminants in air by reading nanohybrid gas sensors multivariate output and processing it inside the algorithm. The algorithm analyzes sensor signal in real time and outputs estimated values for concentrations of target gases.

A process for making highly sensitive nano-nucleated structures for use in room temperature nanohybrid gas sensors which utilize high surface area nanomaterials (carbon nanotubes, dichalcogenides, graphene, metal-organic frameworks, metal oxides, etc.) functionalized with atomically dispersed metal catalysts for sensing airborne environmental pollutants, and co-located with humidity sensing material for higher gas concentration measurement accuracy.

A nanomaterial-based gas sensor system comprising a low voltage circuitry which includes a transducer to detect changes in electrical properties of a multi-channel gas sensor array, analog signal conditioning, and an A/D conversion to provide a signal to a digital back-end.

A gas sensor architecture and implementation, based on hybrid nanostructures, combining a plurality of inter-dependent technologies, including chemical engineering and material science, embedded electronics at board and IC level, MEMS, data science, mobile and Cloud-based applications, to deliver a combination of performance and functional attributes in a solution that is manufacturable in very high volume and will enable the collection of highly granular information related to the presence and concentration of target gases in ambient air.