A particular device includes a coil and a discontinuous magnetic core. The support structure has a substantially frustoconical skin portion which, in use, extends inwardly from the static part. The interrupt is not taken after each sample, but in sufficient time to remove the data and minimize data loss. The jacket is repeatably moveable between positions covering and uncovering the harness so that the jacket can be replaced with another one without removing the harness. The present invention also relates to bitumen binder compositions comprising a -\u03b2-D-glucan in an amount of 0.