Sampling Probes are used for representative sampling of a variety of granular materials, such as fertilizers, grains, dry foods and pharmaceuticals from stockpiles, bags, drums, bins, and such. Gilson’s selection of probes features varying designs and lengths. Double-tube probes have a rotating outer tube that only allows a sample to be collected when open and prevents contamination or loss when closed. Some of these probes have partitioned cells for discrete sampling from different layers. Single-Tube Probes have simple openings to allow material to flow in.