The BG-750 is the largest corer in the BG series – designed for Geochemical coring. This unit is primarily used for deep ocean depths on large vessels. Standard features include:
- a specially designed flow-through box to reduce corer bow wake effect
- double door sealing feature
- Teflon® slides for smooth corer penetration
- adjustable penetration limit stops
- pre-trip safety pin
All aluminum parts are anodized or painted, and fasteners are stainless steel.
A mold for casting lead weight pack and frame weights is included.
Depth penetration is 61 cm.
Material: Aluminum and stainless-steel
Box material: Aluminum with Teflon ®coated interior
Weight: 712 kilos
Height: 225 cm (tripped condition)
Deck Footprint: 110 cm X 110 cm
Box area: 30 cm x 30 cm x 90 cm
Sampling area: 0.1 m2
Box Corers are used to sample soft sediments in lakes and oceans. The corer is lowered vertically until it impacts with the seabed. At this point the instrument is triggered by a trip as the main coring stem passes through its frame. While pulling the corer out of the sediment the spade swings underneath the sample to prevent loss. The recovered sample is completely enclosed after sampling, reducing the loss of finer materials during recovery. Stainless steel doors, kept open during the deployment to reduce any “bow-wave effect” during sampling, are triggered on sampling and remain tightly closed, sealing the sampled water from that of the water column. On recovery, the sample can be processed directly through the large access doors or via the removal of the box completely, together with its cutting blade.
A properly designed and operated box corer is suitable for collecting zoo- benthos (Gage & Tyler 1991, Paterson et al. 1998), surficial sediments (McCave 1985, Ekeroth et al. 2012) and surface concretions (Hessler & Jumars 1974, Veillette et al. 2007). A box corer can also be used for sub-coring to minimize core shortening or for taking replicate subsamples (Blomqvist & Boström 1987).