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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

gas sensors --- hydrogen sensors --- volatile gas sensors --- nitrogen dioxide sensors --- nano-hetero-structure

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A comprehensive overview of sensors technology is provided in specific leading areas. Researchers, engineers and professionals on industries can find advanced technologies, devices, insights and solutions for a broad range of applications, including:• Piezoelectric power transducers• Multisensory for veins detection for robotic-based catheters insertion• Robot-sensor network cooperation for SLAM • Wind speed influences on RGB-D images in trees• Spectrophotometer for physiopathy detection in chickens• Radon gas and ionization detection• Vibrations measurements in robots • Architectures for multisensor intelligent robots• Ultrasound for tissue characterization• Active imaging model• Image-based for crack detection in tunnels• Wireless sensor nodes for energy harvesting, industrial monitoring, concrete cure• Vibroacoustic Impact on the Architectonic Heritage• Sensors motion capture in wearables• Torsional wave sensor• Model-based non-rigid tracking• Stair-Climbing Mobility• IoT-based people monitoring• Laser Speckle System• Odometric in an autonomous electric cart• New control paradigms• Concentric electrodes for ECG and intestinal exploration• Trusted virtual sensors• Thermo-Hygrometric measurements in archaeology• Intensive care unit• Multi-beam Lidar 3D scan• Hyperspectral Imaging in brain tumor• Crowdsensing in smart cities• Strain method to detect tires' loss• Optical force sensor• Portable sensor for substance concentration measurements• High-Frequency content in Human QRS complexes• Fusion of proximity sensors data• Electro-magnetic acoustic system• Computer vision on aerial robots for surface inspection• Dual-reflectarray antennas.

Detectors. --- Sensors --- Engineering instruments --- Physical instruments

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Although the history of chemical sensor dates back not long ago, it has attracted great research interest owing to its many excellent properties such as small size, satisfactory sensitivity, larger dynamic range, low cost, and easy-to-realize automatic measurement and on-line or in situ and continuous detection. With decades of vigorous research works, various sophisticated chemical sensors have been widely used in environmental conservation and monitoring, industrial process monitoring, gas composition analysis, medicine, national defense and public security, and on-site emergency disposal. Hence, the chemical sensor becomes one of the most active and effective directions of modern sensor technology. A typical chemical sensor is the analyzer that responds to a particular analyte in a selective and reversible way and transforms input chemical quantity, ranging from the concentration of a specific sample component to total composition analysis, into an analytically electrical signal. This book is an attempt to highlight recent progresses in the chemical sensors. It is composed of seven chapters and divided into four sections categorized by the working principle of the chemical sensor. This collection of up-to-date information and the latest research progress on chemical sensor will provide valuable references and learning materials for all those working in the field of chemical sensors.

Chemical detectors. --- Chemical sensors --- Chemical apparatus --- Detectors --- Analytical chemistry

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In this work two ideas of using individual metal organic molecules in applications for data storage are presented. On the one hand, metal-free phthalocyanine is used to form a GMR contact consisting of one single molecule leading to the world smallest magnetic sensor. On the other hand, chromium acetylacetonate was used to study the properties of magnetic molecules adsorbed on surfaces in order to build magnetic bits for date storage.

spintronics --- nanotechnology --- magnetic sensors --- giant magneto resistance --- organic electronics

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The main challenge in biosensor development is their application for various practical tasks to provide a continuous and reliable flow of information about the indicators of natural and industrial processes and the surroundings, so enabling adequate feedback and control. Biosensors can provide essential information, as the quality of life depends mainly on our knowledge about what we breathe, what we eat and how our bodies are able to metabolize the material, which we contact. This book includes 14 chapters, written by 52 authors and is focused on the applications of biosensors for monitoring the parameters of environment, the quality of food and biomarkers of health.

Biosensors. --- Biodetectors --- Biological detectors --- Biological sensors --- Biomedical detectors --- Biomedical sensors --- Detectors --- Medical instruments and apparatus --- Physiological apparatus --- Biotechnology