Sampling by free stream:

Spraying is the local application of fluid on the part with a spurt. The method is suitable for cleaning exterior geometries and accessible internal geometries.

The spray method allows – depending on the geometry of the respective control areas –  to apply different parameters to achieve the most efficient release of particles.

Here are the particles collected on a membrane and analyzed.

The characteristic parameters such as flow rate, nozzle geometry, spray distance, amount of liquid and spray pressure are determined by the decay curve.