Thin-walled Shelby tube samplers are designed for taking samples in soft and firm cohesive soils. These samplers have a much lower area ratio (approximately 10%) than U100 samplers and therefore give less disturbed samples.
However, some disturbance is caused due to friction of the sample on the inside of the sample tube. The drive head / Shelby tube head is manufactured with a drill rod box connection to customer requirements (Standard with NW box) and has an air-relief port and a simple arrangement for fixing the sample tubes with 3 grub screws.
Our Shelby tubes are manufactured from stainless steel in a variety of diameters and lengths. When specifying the length of the tube please allow an extra 10 cm for fixing the tube to the sampler head. The cutting edge has a 30 degree chamfer.
Each different sized Shelby tube requires the matching Shelby tube head.