A high volume sediment trap used to investigate the vertical flux of particles in the water column. The trap can be deployed in both oceans and inland waters, and can operate in full oceanographic depth. The trap comes with upper/lower bridles so more traps can be connected in series.

Technical data

• Sediment trap, 0,5m², with honeycomb and plastic bottle, 5L
• Steering fin.
• Zinc anode protection against corrosion
• Inner diameter of cone: 80 cm (0,5m²)
• Rack and cone is manufactured from AISI 316 stainless steel
• L x W x H: 113 x 138 x 270 cm inclusive, steering fin and upper/lower bridle for adding more traps or lead weights
• Height of the rack itself: 152 cm
• Each bridle comes with a swivel
• Weight 91 kg

The system is delivered with a standard size collecting bottle of 5 L, however if other sizes are required, they can be made. The honeycomb is made out of acrylic plastic, which is fitted into the cone at the top to direct the fall of the sediment, and prevent disturbance in the cone doing deployment.

Sediment sampling with time lapsed trigger

Capacity: 12 bottles, 0,5 L each or 24 bottles, 0,25 L/each. Other sizes upon request.

Power supply: Battery cylinder with Li-ion batteries. 24 VDC

Maximum depth: 6000 m

Time lapsed trigger: Programmable timer for individual release of a maximum of 99 water samplers; 

Delay: The delay between each sample is fully programmable at any value between 1 minute and 1080 hours (45 days).

Details: A pressure compensated motor at front

Honeycomb: Top of funnel is covered by a Honeycomb. The funnel has an internal diameter of 570 mm (0,25 m²) or 800 mm (0,5 m²).

Rack for sediment trap: Manufactured from AISI 316 stainless steel

The construction of the sediment trap array ensures a permanently vertical position of the sampling tubes during deployment. The steering fin (optional) and the pivot joints force the array to be held at right angle to the current. The system is fully configurable. All parts are detachable and the main rack can be attached with 1, 2, 3 or 4 tubes to suit your needs for analysis. The Sediment Trap consist of detachable cylindrical sampling tubes mounted with lead weights at the bottom. The gimballed tube holders and fin are made of AISI 316 stainless steel. The tubes are made of transparent PVC and have an aspect ratio above 6.

The United States Geological Survey (USGS) originally developed the Helley-Smith sampler for collecting sand, silt, gravel, or rock debris carried by streams above the seabed. The sampler is a good choice for collecting bed load materials, which have a partial size or a density that does not allow great movement above or away from the streambed. It makes it possible to define the rate at which dams can fill and thus improve the ecological continuity of water flows by allowing sediments to be sifted at the right times. The chamber has a square opening of 64 cm² (8 x 8 cm).

As standard, the sampler comes with 100 µm nets on 3 sides, while the top section of the net is 250 µm, other combinations can be made upon request.

Technical data

• Net bag: Upper part 250 µm, other parts 100 µm, length 54 cm.
• Sample area 64 cm².
• Manufactured from 2 mm AISI 316 stainless steel and 6 mm bars for the rack itself.
• L x W x H: 96 x 25 x 83 cm.
• Height without pole: 13 cm.
• Weight 4,2 kg.