Science Daily October 19, 2018
Researchers at the National Institute for Standards and Technology have designed a portable vacuum gauge that is small enough to deploy in commonly used vacuum chambers. It requires no calibration, depends on fundamental constants of nature, reports the correct quantity or none, and has specified uncertainties that are suitable for its application and allows lower levels of vacuum to be accurately measured. It uses only a single laser beam directed onto a diffraction grating. It will be used to make measurements of fundamental atomic properties. Such a system that could potentially replace sensors now on the market… read more. TECHNICAL ARTICLEÂ
Schematic diagram of NIST vacuum sensor design. Credit: Daniel Barker/NIST