自由下落沉积物采样器

产品编号:
04.29

申请:

  • 土壤环境研究
  • 沉积物采样

The free-fall corer is a sampling tool for fairly undisturbed sampling from the top layer of submerged sediments either or not consolidated. The free-fall corer consists of a frame with strengthening ribs, falling weight and sampler. Using a hoisting unit (davit) on board of a boat the sampler is lowered in free fall. By its own weight and velocity the apparatus penetrates the submerged soil. The depth of penetration is partly determined by the composition of the submerged soil. In soils rich of mud, penetration will reach to about 80 cm, in more sandy soils this will be about 30 cm. After lifting the sampler an immediate rough description of the stratification of the submerged soil is possible due to the transparent tube and also the depth of penetration can be measured. After removing the sample further description regarding the composition, colour, smell and particulars if any, is possible.

04.29 好处 自由落体取芯器

  • 线缆操作,采样深度无限制
  • 超级快速,无需锚固
  • 球阀在顶部,以防止样品损失•

备注

  • 需要自由落体卷扬机和配吊艇架的船
  • 体积和重量相当大
  • 样品在水样或粗沉积物中有损失
  • 无活塞,样品可能压实
  • 无采样深度控制

Applications

  • The free-fall corer is applied particularly when sampling with rod operated equipment poses problems because of too great water depth and current velocity.
  • Sampling is done on behalf of environmental research, soil research and geo-hydrological research.

Note: During sampling with the free-fall corer samples are compressed, in some cases this may amount to a factor 2. The problem of  compression can be avoided by using a sediment sampler, type Beeker sampler (04.23.SA).