Preposition: in

• unit: The data themselves must be the common logarithm of intensity or flux density in arbitrary units.

Adjective modifier

• magnetic: Highest individual measurements of magnetic flux densities in the range 2 to 10 microteslas were encountered in close proximity to the feeder cables.

Noun used with modifier

• peak: The distributions of the flux, area, peak flux density and lifetimes of the concentrations are determined.