Hand-operated equipment can be applied for soil research up to a depth of 5 to 10 meter. In this product information leaflet a number of gouge augers are described. Their mutual quality is that they are all fitted with an almost half cylindrical operational part with parallel cutting edges running vertically, justifying the name gouge auger. This operational part may vary in length as well as in diameter. The most suitable length depends on the penetration resistance, the substance of the soil and the required boring depth. The longer the operational part the more vulnerable the auger is to torsion. The selection of the most suitable diameter depends on the composition and the structure of the soil and on the purpose of the research. In general a smaller diameter is applied in soils with a fine and/or dense structure, by comparison to soils with a loose structure (for instance young swampy peat).

The sample sets with postfix SC and SE, for very hard soils, can be used to take samples in virtually all soils. The samples can be taken on the surface, in auger holes or in profile pits, above as well as under the groundwater level. The closed ring holder in this set is fitted with a conical threaded connection which means that the ring holder may also be hammered into the soil with an impact absorbing hammer. The set, among other items, contains: a closed ring holder, a handle with beating head, an Edelman- and a Riverside auger, extension rods, a hammering head with a guide cylinder, an aluminium case with soil sample rings and various accessories. The sample sets with the postfix SC can be obtained for soil sample rings with a diameter of 53, 60 and 84 mm. The most commonly applied (standard) diameter is 53 mm (07.53.SE is only available in the diameter 53 mm). Soil sample rings Soil sample rings are stainless steel rings made of seamless tubes, smooth inside and out. The bottom of the ring has a cutting edge. The dimensions, and thus the volume content, of soil sample rings are exactly known, which makes them highly suitable for laboratory studies. With soil sample rings undisturbed samples are taken.