
Environmental Grabs
Grab sampling is the simple process of bringing up surface sediments from the seafloor. Once it is launched, the jaws of the grab sampler open and it descends to the seafloor. A spring closes the jaws, and they trap sediments or loose substrate. The grab sampler is then brought up to the surface where its contents are studied in detail.
The type of gear selected for sampling seabed substrata and the benthic macrofauna at aggregate dredging sites is primarily determined by the hardness/ compactness of the substrata. Whilst a wide variety of sampling methods are available, only a small proportion of these have the ability to effectively collect samples from areas of relatively coarse sediments which are characteristic of dredging sites.
In certain situations, it may be necessary to use more than one technique in order to sample the full range of benthic organisms present in an area.
CMS GeoScience has a wide range of benthic grabs and sampling equipment including:
Hamon Grab
Mini Hamon Grab
Single Day Grab
Double Day Grab
Single Van Veen Grab
Double Van Veen Grab
Beam Trawl
Box Corer
Beam Trawl
Hydraulic Clam Shell


Get in Touch
CMS GeoScience Ltd
Unit 4
Brooke Business Park
Heath Road
Lowestoft
Suffolk
NR33 9LZ
01752 500333
Related Services:
Geotechnical Sampling
Benthic & Environmental
Oceanography & Metocean
Geophysical Survey
Structural Inspections