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Physical Measurement Laboratory / Sensor Science Division

Fluid Metrology Group

Projects/Programs

Displaying 1 - 9 of 9
The NIST Acoustic Thermometer

Acoustic Techniques in Fluid Metrology

Ongoing
The Fluid Metrology Group leads the world in designing and using gas-filled acoustic resonators for measuring the thermodynamic temperature T, the Boltzmann
The NIST wind tunnel

Air Speed Metrology

Ongoing
NIST's versatile wind tunnel is used to calibrate customers' airspeed sensors and to conduct research on the design of novel anemometers, the responses of
shaded quasi sphere

Atomic Standard for Pressure

Ongoing
NIST scientists are developing a highly accurate primary standard for pressure in the range 2 MPa to 7 MPa based on fundamental physical properties of helium
two-capillary viscometer

Gas properties for flow metering

Ongoing
Flow meters that rely on measuring the pressure drop across a laminar flow element can be accurately calibrated using a benign surrogate gas (such as helium or
NIST researchers measuring a flow profile

Smoke Stack Flow Measurement

Ongoing
Presently used methods to measure CO2 and other emissions from smoke stacks have errors of 20 % or more depending on the level of swirl in the flow. The
Transient flow facility for vehicle refueling

Transient Flow Facility

Completed
Today, demonstration vehicles are refueled with hydrogen from dispensers within 3 to 5 minutes using sequential gas releases from a bank of pressurized
temperature distribution graphs

Understanding Flow Meters

Ongoing
Accurate flow measurements are needed for test fluids, temperatures, pressures, flows, and installation conditions that differ from those used during NIST's