Gas Flow/Air Velocity

ORNL Metrology Laboratory (ORNLML) maintains a variety of air velocity and gas flow standards traceable to SI (International System of Units) through the National Institute of Standards and Technology (NIST) and other international primary laboratories. These standards generate and measure various air velocity and gas flow properties required to perform traceable calibrations of our customers’ instruments and equipment. ORNLML can provide accredited calibrations for any gas flow parameter within the ranges detailed in our Scope of Accreditation. However, traceable non-accredited calibrations are available for air velocity and gas flow parameters outside of our Scope of Accreditation. The tables below list our accredited capabilities. Our entire Scope of Accreditation can be found at the following link.

Typical types of equipment the ORNLML performs air velocity calibrations on are: anemometers, standard laminar flow elements and sonic nozzles. Gas flow rotameters and flowmeters, laminar flow elements, mass flow controllers and meters, and Bubble-O-Meters are instruments that can be calibrated at ORNLML. If you have questions about our air velocity and gas flow capabilities, please contact the ORNL Metrology Laboratory for more information.

*Represents an expanded uncertainty using a coverage factor, K=2, at an approximate level of confidence of 95%.