We describe an improved laminar flow meter suitable for comparing gas flow rates from 1 -to- 1000 micromol/s (about 1 to 1000 sccm) with an accuracy of approximately 0.1%. The flow impedance consists of coils of commercial quartz capillary tubing. The capillary radius is less than 0.01% of the length, which reduces corrections due to gas expansion and the pressure drop at the entrance. A small aspect ratio also was used in the flow meter recently modeled by Berg and Tison.@footnote 1@ That flow meter's impedance was a machined helical duct of rectangular cross section. In contrast, the present quartz capillaries have a circular cross section, which allows the model of the flow meter to use Van Dyke's analytical expression for centrifugal effects.@footnote 2@ Although such corrections are as large as 3% at the largest flow rates, the model requires only one free parameter, the capillary radius. A model with minimal empiricism allows the standard to be used confidently with varied gases, varied outlet pressures, and integrated measurements as well as continuous measurements. Measurements with two primary standards are described. The first set compared the transfer standard's continuous output to PVT measurements, and the second set compared the integrated output to the mass changes of a gas cylinder. @FootnoteText@ @footnote 1@ AIChE J. 47, 263 (2001). @footnote 2@ J. Fluid Mech. 86, 129 (1979).