Articles: Sensors/Data Acquisition
Briefs: Electronics & Computers
A middle infrared light source can detect greenhouse and other gases as well as molecules in a person’s breath. The compact system, which resembles a tiny suitcase, contains just two parts: a standard...
Briefs: Test & Measurement
Engineers have remotely determined the temperature beneath the surface of certain materials using a new technique called depth thermography. The method may be useful in applications where...
Briefs: Photonics/Optics
Any space, enclosed or open, can be vulnerable to the dispersal of harmful airborne biological agents. Silent and near-invisible, these bioagents can sicken or kill living things before...
Application Briefs: Photonics/Optics
Briefs: Sensors/Data Acquisition
Articles: Test & Measurement
Briefs: Test & Measurement
Application Briefs: Imaging
Briefs: Electronics & Computers
Briefs: Test & Measurement
Briefs: Sensors/Data Acquisition
Briefs: Test & Measurement
NASA Spinoff: Test & Measurement
Articles: Sensors/Data Acquisition
Briefs: Test & Measurement
Systems and Methods for Correcting Optical Reflectance Measurements
Optical spectroscopy can be used to determine the concentration of chemical species in samples. The amount of light absorbed by a particular chemical species is often linearly related to its concentration through Beer’s Law. For nontransparent materials such as powders,...
Briefs: Photonics/Optics
Measurement Method for Radioactive Methane
Anew method for measuring radioactive methane is an optical one based on spectroscopy. Previously, radioactive methane has been measured with accelerator mass spectrometry involving expensive machines. Optical measuring could be a cheaper and more agile method.
Briefs: Test & Measurement
Researchers at NASA’s Armstrong Flight Research Center have identified and evaluated recently available miniature spectrometers that enable compact and robust pyrometry...
Briefs: Nanotechnology
Pulsed laser vaporization (PLV) production of single-wall carbon nanotubes (SWNTs) on traditional Co/Ni catalyst was explored with...
Briefs: Photonics/Optics
The detection and localization of gas releases, such as methane from leaking natural gas pipelines or nitrogen oxides from failing electrical equipment, require high sensitivity to the target gas and insensitivity...
Briefs: Sensors/Data Acquisition
Spectrometers are widely used for applications such as chemical analysis, remote sensing, quality control, environmental monitoring, spaceborne measurements, and optical measurements. Most spectrometers...
Briefs: Photonics/Optics
Configuration Enables RFID Tags to Work as Sensors
The detection and localization of gas releases, such as methane from leaking natural gas pipelines or nitrogen oxides from failing electrical equipment, require high sensitivity to the target gas and insensitivity to non-target gases. Infrared (IR) absorption spectroscopy gives highly specific...
Briefs: Sensors/Data Acquisition
Infrared spectroscopy is the benchmark method for detecting and analyzing organic compounds. However, that requires complicated procedures and large, expensive instruments, making...
Briefs: Aerospace
A material was developed for nuclear radiation detection that could provide a significantly less expensive alternative to the detectors now in commercial use. Specifically, the high-performance material is...
Briefs: Photonics/Optics
Correlation spectroscopy is an attractive technique for sensing and analysis applications because it combines the attributes of mechanical and optical simplicity, high selectivity, and good sensitivity. In...
Briefs: Mechanical & Fluid Systems
Mobile Instrument Detects and Samples Aerosol Particles
Hazardous airborne particles pose a risk for health and safety in a variety of environments; thus, detection of these small particles is essential. Current particle magnification systems are bulky and require a lot of power for operation, making them unsuitable to easily detect and analyze...
Briefs: Sensors/Data Acquisition
For decades, mass spectrometers have offered a relatively fast and highly sensitive way to analyze and detect chemical compounds. But their bulky size has been a hindrance, limiting the in-field potential of the...
Briefs: Electronics & Computers
Technique Measures Temperature of 2D Materials at the Atomic Level
Newly developed two-dimensional (2D) materials such as graphene — which consists of a single layer of carbon atoms — have the potential to replace traditional microprocessing chips based on silicon, which have reached the limit of how small they can get. But engineers have...
Application Briefs: Sensors/Data Acquisition
Farming has not been untouched by the IoT revolution. The relationships among field conditions, crops, and strategies for planting, irrigating, and harvesting are complex, yet vital for...
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