Measurement of surface gas mass flow in container - uses rotating sphere or cylinder in magnetic field

摘要

The method is used for accurate measurement of the surface gas mass flow in a container. This is achieved without the use of temp. and pressure measurement. The measurement is made by recording the time variation in revolution rate of a body suspended in a magnetic field in the container and set in rotation. The body is of known density and size. For a sphere of known dia. the gas mass flow is related to the density, dia., and a time measurement.