Interface Corers
An interface corer is used to collect samples of surface sediment (to 1 m depth).
A multitube corer is used for studying meiofauna (small benthic fauna measuring between 32 µm and 1 mm) and microfauna (bacteria).
Using an array of plastic tubes it takes samples of undisturbed surface sediment to a depth of approximately 300 mm. Its maximum dive depth is 5000 m.
The corer comprises an array of tubes which slides within a frame that sits on the sea floor.
Designed by Dr Ville of the now defunct CNEXO, this corer is used in shallow waters to take samples in hard, compact areas.
Architecture
The Cnexoville has a cylindrical metal fuselage from which protrudes a short tube with a rock-penetrating tip. The tube penetrates the sediment under force of gravity.
- Weight of ballast and fuselage: 450 kg
- Diameter of fuselage: 60 cm
- Length of ballast and fuselage: 2.60 m
- Dimensions of tube: 50 cm x Ø100 mm
An USNEL corer is used to study macrofauna (benthic fauna of intermediate size, between 250 µm and 1 mm)
Various studies can be performed: spatial and vertical distribution, density and biomass, community composition and structure.
This type of corer is designed to sample loose surface sediment using metal boxes. Sample thickness is approximately 500 mm. Maximum working depth is 5000 m.
General architecture
Two USNELs are available.
USNEL No. 1
- Diameter on the ground: approx. 2.20 m
- Height overall: approx 2.50 m
- Total weight: 800 kg
USNEL No. 2
- Diameter on the ground: approx. 1.70 m
- Height overall: approx 2.60 m
- Total weight: 800 kg