Sampling equipment e.g. for cosmetic or pharmaceutical powders - uses vacuum to draw powder into chamber and then into second chamber

摘要

Powder (6) to be sampled is stored in a tank (5) at atmospheric pressure. Manually operated stopcocks (23,25) are opened while automatically operated valves (3,9) are closed. A vacuum pump (17) reduces pressure in two chambers (1,7). The stopcocks (23,25) are then closed. An automatic control and timing unit (27) opens the automatic valves (3,9) in succession so that powder is drawn into the first chamber (1) and then from there into the second chamber (7) where it is deposited on a sampling unit (32). USE/ADVANTAGE - For sampling food products, pharmaceuticals, ceramics, oxides of plutonium or uranium, or cosmetic powders to determine form of particles to predict future characteristics of cohesion and resistance of products made from powder. Enables truly representative sample to be taken from quantity of powder.