The suspended load sampler Delft bottle is used to measure suspended sediment transport in rivers and other water courses, from the surface down to 0.1 metres above the river bottom. The water containing sediment flows through a bottle shaped collector. The shape induces a low pressure at the rear part of the device, so the water enters the nozzle of the sampler with almost the same velocity as the undisturbed flow.
When the water reaches the wide sampling chamber, the velocity decreases and this causes the sediment material to settle. The sampler is made with a sturdy construction. Because of the weight of the instrument, a davit with depth gauge and winch is required for handling. Please note that simultaneous measurement of the water speed is necessary.
The suspended load sampler is easy to use. The sampler can be used in two ways:
With no frame, suspended on a cable for all depths from the surface to 0.5 metres above the bottom. A tail fin keeps the nozzle in up-stream direction
With frame, standing on the bottom, the height can be set to 10, 20, 30, 40 and 50 centimetres from the bottom.
SCOPE OF DELIVERY
- Delft bottle sampler
- Nozzle 1.9 cm², straight
- Nozzle 1.9 cm², bended
- Nozzle 3.8 cm², straight
- Nozzle 3.8 cm², bended
- Measuring glass, content 100 millilitres
- Frame for Delf bottle, for use bottom placement
- Wooden case for Delft bottle
