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 spare stainless steel box and galvanised cutting blade can then be added, ready for an immediate re-deployment.
The USNEL type box corer has become the standard sampling tool for surveys in soft or deep sediments. The enlarged surface area of the box (0.25m2) allows for relatively large sample sizes to be recovered in deep water where the time required to deploy and recover the instrument is significant. Our standard box corer is built within a gimballed hexagonal frame. The instrument is triggered by a trip as the main coring stem passes through its frame. The sample box is 50 x 50 cm and has a maximum depth of penetration of 50 cm which can be controlled to prevent over-penetration in softer sediments.
To deploy the USNEL type box corer you will need an "A" frame with at least 3 .5m clearance and approximately 5 .5 to 6 m for recovery once the corer has been triggered. These are estimated figures and if critical to your operation exact mesaurmetn can be supplied on request.
|Surface Area||0.06m2 & 0.25m2|
|Sampler weight||200kg & 800kg|
|Adjustable Ballast||Nil & 200kg|
|Dimensions||~1x1x1.5 & 2x2x3m ( Approximate figures)|
|Construction||Galvanised & Stainless Steel|
|Normal depth of operation||0-500m & any depth|