Dormer PISTON SAMPLER Casing Clamp Pulley & Sleeve Stainless Steel Surface Type with Accessories 3.0M

Dormer PISTON SAMPLER Casing Clamp Pulley & Sleeve Stainless Steel Surface Type with Accessories 3.0M

The Piston Sampler takes undisturbed samples from water-saturated soils like marine mud & silty sand. It operates on the same principle as the fisherman's bait pump. You push down on the outer tube simultaneously as you pull up on the piston. The piston is positioned while the tube is removed from the hole. Dormer manufactures Piston Samplers from Stainless Steel tubes in diameters of 50mm, 62mm, 75mm & 100mm with lengths to suit your requirements.

The Piston Sampler comes in two main types: the surface type and the downhole type. The surface type is for sampling from the surface level down to the length of the sampler in one operation. It comes with a moveable casing clamp that allows the operator to add body weight to assist with the insertion and also acts as a handle for removing the sampler tube from the hole.

The surface type also comes with a removable pulley mounted to the top of the sampler to help pull the piston up via a rope (in most cases, the top of the sampler is above your head at the start of the sampling). Pulling on the rope through the pulley also adds downforce to the sampler.

The sample is removed by either pushing the piston with loose extension rods (or a dowel) or by removing the piston and shaking the sample out. We supply a 300mm long sleeve to catch the sample, or it can be expelled onto trays or clear plastic tubing (not supplied).