Screw Sampler

Operating behavior & mechanical features

Screw Sampler, Type SPN protrude into the material flow and take a punctual sample from the falling product.

Sampling is carried out via a sample collection tube projecting into the material flow, which is provided with openings into which material can fall. At the time of sampling, the screw conveyor first empties the sample collection tube in the direction of the material flow. After a defined emptying time, the screw reverses and conveys the sample material that has fallen into the sample collection tube into a pipe socket outside the main tube.

The term punctual sample is used because only a partial area of the product-bearing cross-section is recorded. Despite this partial detection, Screw Sampler, Type SPN can still generate representative samples. This is guaranteed, for example, if the product flow is homogeneous across the cross-section and none of the properties to be analyzed are linked to the particle size. However, if these are dependent on the particle size, we recommend using a sampler that covers the entire cross-section, such as our Downpipe / slurry sampler Type FPN / TPN.