An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
In support of defense programs in remote sensing, NIST maintains the scale for infrared radiant flux by using an Absolute Cryogenic radiometer (ACR) in a low
The NIST Ac-dc 2 Difference Project performs leading edge measurement services and research for ac-dc difference measurements and dc voltage metrology. We
The Fluid Metrology Group leads the world in designing and using gas-filled acoustic resonators for measuring the thermodynamic temperature T , the Boltzmann
New Standard Reference Materials (SRMs) consisting of activated carbon sorbent materials and flue gas desulfurization (FGD) gypsum are being developed to
The development of new materials for diverse applications relating to the development of new energy sources, more efficient homes, autos, and aircraft, and the
The Surface and Trace Chemical Analysis Group conducts both applied and fundamental research into the development, characterization, and analysis of various
Electron, ion and photon-based microanalysis methods, instrumentation and protocols are developed to advance measurement science towards the elemental and
In this project we measure the fundamental electrical properties of materials from bulk to nanoscale from 1 MHz to 0.3 THz. Understanding the interaction of
Electricity meters today face unprecedented challenges, from distorted waveforms on the grid, bidirectional metering for renewables, and the use of meters as
Advanced microscopy and spectroscopy techniques are used in this project to study the chemical and physical properties of particles contained in complex
Specialized imaging methods with high spatial resolution are essential for advancing the physical understanding of emergent materials in advanced electronics
This effort uses advanced fluid flow visualization and flow diagnostic techniques to better-understand the role of fluid dynamics in our Safety & Security focus
Ambient and atmospheric pressure mass spectrometry platforms provide sample collection, transport, and ionization for vapor, aerosol, and liquid samples
Atmospheric aerosol particles often have compositions and shapes that cannot be described as a single material phase within a simplified geometric form such as
As part of NIST's response to the Materials Genome Initiative (MGI), this project provides resources to address some of the challenges to the wider use of
EPA Protocol gas mixture calibration standards are obtained by users to measure emissions of regulated gaseous species and ensure that they comply with US
We are developing novel machine learning algorithms and incorporating them into closed-loop autonomous systems to accelerate knowledge capture in the lab and in
ROSI (Robotic Optical Scattering Instrument) is a new facility for measuring reflectance and scattering of materials in the ultraviolet to short-wave infrared
The Dosimetry Group calibrates well-type ionization chambers using Xoft miniature x-ray sources, which provide low-energy x-rays (< 50 keV) for electronic
The new NIST x-ray calibration facility has been designed to improve the measurement conditions for x-ray scatter, motion control, environmental conditions
Absorbed dose is the energy imparted per unit mass by radiation to an irradiated target. The SI unit of absorbed dose is the gray (abbreviated Gy), equivalent
The Gas Sensing Metrology Group at NIST develops primary gravimetric standards for a wide variety of CO2 measurement uses. For the past 40+ years the group has
NIST's Chemical Sciences Division Gas Sensing Metrology Group has participated in over 40 Consultative Committee for Amount of Substance-Metrology in Chemistry
Huntington disease is a neurodegenerative disease of midlife onset that produces choreic movements and cognitive decline, often accompanied by psychiatric
**Update** As of September 1, 2015, SRM 2366a Cytomegalovirus DNA (TowneΔ147 BAC) for DNA Measurements was made available. The new material is a single