Results 311 to 320 of about 4,775,034 (345)
Some of the next articles are maybe not open access.
IEE Colloquium on Condition Monitoring of Large Machines and Power Transformers, 1997
Many utilities rely upon a laboratory analysis of dissolved gas as their primary condition monitor for power transformers. The routine sampling period is annually but some utilities extend this to up to three years. The author briefly outlines the development of gas sensors since the 1970s mentioning their advantages and drawbacks.
T. McGrail, A. Wilson
openaire +2 more sources
Many utilities rely upon a laboratory analysis of dissolved gas as their primary condition monitor for power transformers. The routine sampling period is annually but some utilities extend this to up to three years. The author briefly outlines the development of gas sensors since the 1970s mentioning their advantages and drawbacks.
T. McGrail, A. Wilson
openaire +2 more sources
Gasistor: A memristor based gas-triggered switch and gas sensor with memory
Applied Physics Letters, 2019Capacitorlike metal/metal oxide/metal structures are widely used as resistive switching cells and are utilized in resistive random access memories. Recently, it has been demonstrated that they also perform well as gas sensors.
Marek Vidiš +7 more
semanticscholar +1 more source
2008
This chapter covers selected topics on sensors and analyzers from the point of view of its fundamentals, their development, and their applications in buildings, transportation, medicine, homeland security, and industry, with which the author was involved during his 42 years with the Honeywell Labs.
openaire +2 more sources
This chapter covers selected topics on sensors and analyzers from the point of view of its fundamentals, their development, and their applications in buildings, transportation, medicine, homeland security, and industry, with which the author was involved during his 42 years with the Honeywell Labs.
openaire +2 more sources
2007
The surface conductivity of many metal oxide layers is influenced by the composition of the ambient air. Small quantities of reducing or oxidizing gases can change the layer resistance by several orders of magnitude. The reversible adsorption or desorption processes at semiconductor surfaces are made selective to different gases by choosing appropriate
Werner Dipl Phys Dr Hagen +2 more
openaire +2 more sources
The surface conductivity of many metal oxide layers is influenced by the composition of the ambient air. Small quantities of reducing or oxidizing gases can change the layer resistance by several orders of magnitude. The reversible adsorption or desorption processes at semiconductor surfaces are made selective to different gases by choosing appropriate
Werner Dipl Phys Dr Hagen +2 more
openaire +2 more sources
2020
In this chapter we present an overview of optical gas sensors based on sol-gel materials, with particular emphasis on surface plasmon resonance-based sensor. The definition of optical gas sensor and the main parameters used for characterizing gas sensors are described in the introduction.
Massimo Guglielmi, Alessandro Martucci
openaire +1 more source
In this chapter we present an overview of optical gas sensors based on sol-gel materials, with particular emphasis on surface plasmon resonance-based sensor. The definition of optical gas sensor and the main parameters used for characterizing gas sensors are described in the introduction.
Massimo Guglielmi, Alessandro Martucci
openaire +1 more source
AIP Conference Proceedings, 1976
The sensor consists of a porous core of some magnetic material with an induction coil wrapped around it. Exposure of th core to oxidizing or reducing gases causes chemical changes to occur. These result in changes in the core’s magnetic properties which are observed as changes in the inductance of the coil.
Harold Duane Hanson +2 more
openaire +2 more sources
The sensor consists of a porous core of some magnetic material with an induction coil wrapped around it. Exposure of th core to oxidizing or reducing gases causes chemical changes to occur. These result in changes in the core’s magnetic properties which are observed as changes in the inductance of the coil.
Harold Duane Hanson +2 more
openaire +2 more sources
2005
A benchmark for the heat transfer problem, related to modeling of a microhotplate gas sensor, is presented. It can be used to apply model reduction algorithms to a linear first-order problem as well as when an input function is nonlinear.
Tamara Bechtold +2 more
openaire +2 more sources
A benchmark for the heat transfer problem, related to modeling of a microhotplate gas sensor, is presented. It can be used to apply model reduction algorithms to a linear first-order problem as well as when an input function is nonlinear.
Tamara Bechtold +2 more
openaire +2 more sources
Highly selective and reversible NO2 gas sensor using vertically aligned MoS2 flake networks
Nanotechnology, 2018We demonstrate a highly selective and reversible NO2 resistive gas sensor using vertically aligned MoS2 (VA-MoS2) flake networks. We synthesized horizontally and vertically aligned MoS2 flakes on SiO2/Si substrate using a kinetically controlled rapid ...
Rahul Kumar +5 more
semanticscholar +1 more source
Advanced Functional Materials, 2018
A high‐performance, transparent, and extremely thin (
Sung Min Kim +7 more
semanticscholar +1 more source
A high‐performance, transparent, and extremely thin (
Sung Min Kim +7 more
semanticscholar +1 more source
Nanocomposites in Gas Sensors: Promising Approach to Gas Sensor Optimization
2013Present short chapter gives general view on the prospects of nanocomposites applications in gas sensor design. Chapter includes 1 figures, 1 Tables and 24 references.
openaire +2 more sources