NIST’s Thermodynamic Metrology Group (TMG) is a key player in developing and maintaining national pressure measurement standards. Their services cover a wide range of pressure measurements from 10^-7 Pa to 280 MPa, using various calibration methods including piston gauges, low-pressure manometry, vacuum gauges, and flow/leak measurements.
The TMG is also involved in primary research projects to develop new pressure measurement technologies. They are working on a new primary standard for pressures between 1 Pa and 360 kPa using the optical refractive index of gas, which can also serve as a primary standard for temperature and improve in-situ length measurements. Additionally, they are researching dynamic pressure measurements for time-dependent processes and pressure/blast waves, where microsecond response is crucial.
These efforts by NIST’s TMG are essential for improving pressure measurement capabilities in user facilities and developing new national standards, which will have a significant impact on various applications requiring high-accuracy pressure measurements.
Source: https://www.nist.gov/programs-projects/pressure
Keywords: Metrology, Pressure, Standardization, Calibration, Precision
