Abstract: The powder sampling device comprises, next to a vertical channel (1) a drawer that is also vertical which may be lowered so that a groove (5) passes into a sampling mouth (12). A flap (15) may be extended to direct the powder towards the groove (5) temporarily and fill it, without the drawer (4) or the flap (15) disrupting the flow in normal circumstances nor causing any residue of powder likely to alter the measurements. In particular, the flap (15), the groove (5) and the corbelled section (2) have faces (6, 8) that are heavily angled on which the powder can only slide.

Abstract: The powder sampling device comprises, next to a vertical channel (1) a drawer that is also vertical which may be lowered so that a groove (5) passes into a sampling mouth (12). A flap (15) may be extended to direct the powder towards the groove (5) temporarily and fill it, without the drawer (4) or the flap (15) disrupting the flow in normal circumstances nor causing any residue of powder likely to alter the measurements. In particular, the flap (15), the groove (5) and the corbelled section (2) have faces (6, 8) that are heavily angled on which the powder can only slide.

Abstract: The liquid to be measured flows through a flow-pipe and bathes the end (1) of a pivoting probe in a spectrophotometric cell (2). One measuring surface (15) of the probe (2) remains immersed in the liquid whose level is advantageously assured by an overflow barrier (19); but when the probe has pivoted, the measuring surface opens onto a duct (23) in which a rinsing liquid flows and leads into the flow-pipe and cleans it. This rinsing is quick and safe and requires no dismounting of the probe. The invention applies in particular to liquids containing radioactive products such as uranium and/or plutonium.

Abstract: The powder mixing apparatus comprises a circular section cylindrical body having a longitudinal axis that is substantially horizontal, the body being leakproof and having two disk-shaped walls and an annular wall, the apparatus having a disk placed coaxially inside said body, the edge of said disk being substantially in contact with the annular wall so as to subdivide said body into two cylindrical compartments of substantially equal volume, said disk being provided on each of its faces with at least one blade for guiding said powder during rotation of said disk to a transfer orifice passing through said disk so as to enable at least a portion of the powder contained in one compartment to pass into the other compartment on each revolution of the disk, said blades being angularly offset, a horizontal drive shaft secured to the center of said disk serving to rotate said disk, and motor means serving to drive said drive shaft.