U.S. flag

An official website of the United States government

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.

Physical Measurement Laboratory / Sensor Science Division

Fundamental Thermodynamics Group

News and Updates

Displaying 26 - 35 of 35
portable vacuum standard

New Portable Vacuum Standard

A novel Portable Vacuum Standard (PVS) has been added to the roster of NIST's Standard Reference Instruments (SRI). It is now available for purchase as part of
radiograph of mechanism

Protecting Vacuum Gauges: Patent Pending

PML researchers have applied for a provisional patent on a device to protect expensive "spinning-rotor" high-vacuum gauges – used as transfer standards and
Mark Luce with new document case

Making the Case for History

The original Declaration of Independence on display at the National Archives reaches its 237th anniversary this year protected by NIST science and engineering
Illustration showing the laser pulses being emitted, the pulses striking the greenhouse gases, and the backscattered photons returning.

Progress and Promise in DIAL LIDAR

For climatologists and environmental policy makers who need to determine the flux of greenhouse gases (GHG), there are three paramount questions: Where is it