Piston insertion sampler

Operating behavior & mechanical features

Piston insertion samplers take a punctual sample from the falling product.

Sampling is carried out using a sample spoon that enters the material flow and fills with sample material after an appropriate waiting time. The sample material is obtained after the sample bucket has been rotated or scraped back. The sample material obtained in this way can be transferred to a pipe socket outside the main pipe.

When retracted, the sampler closes off the material flow via a closing plate attached to the sampling spoon. This keeps the material flow free of fixtures that could obstruct the material flow.

The sample spoon is moved by a pneumatic cylinder or manually.
The term punctual sample is used because only a partial area of the product-bearing cross-section is captured. Despite this partial detection, however, piston samplers 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 associated with 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.